Why did my last lash extensions fall out in a week?

Almost always one of three things: cheap or expired glue that breaks down in Chiang Mai's humidity, premade fans that are too heavy for the natural lash, or rushed isolation that glues two natural lashes together so they pull each other out. Aftercare (water, oil-based products, rubbing) can also halve the lifespan of any set.

What does My Lash House's 3-day retouch guarantee cover?

Abnormal shedding within the first three days caused by a glue or application issue on our side — message us on Instagram with photos within 3 days and we book you in for a free retouch. It does not cover loss from rubbing, getting the lashes wet within the first 2 hours, or using oil-based cleansers and removers.

Can I get lash extensions wet?

Not for the first 24 hours — that's when the glue is curing. After day one, normal showering and gentle washing is fine. Avoid steam rooms, saunas, and submerging your face for long periods. Always pat dry with a lint-free cloth; never rub.

How often should I get a refill?

Every 2–3 weeks is the sweet spot. The set still looks dense, and the artist has enough remaining lashes to map cleanly into. If you wait longer than 4 weeks, a refill often costs the same as a fresh full set and looks worse — better to start over.

Will lash extensions damage my natural lashes?

Properly applied extensions don't damage natural lashes. Damage comes from oversized fans on weak lashes, poor isolation, or pulling at them yourself. The 0.05mm handmade fans we use sit lightly and shed with the natural lash on its normal cycle.

How do I clean lash extensions?

Use a dedicated lash shampoo (foam-type works best), once a day. Apply with the soft brush, rinse with cool water, pat dry with a lint-free cloth, then brush through with the spoolie we send you home with. Avoid cotton pads and any oil-based cleansers near the eye area.

How Long Do Lash Extensions Last? (Chiang Mai 2026 Guide + 3-Day Retouch Guarantee Explained)

Q: How long do lash extensions last?

With proper aftercare, a professionally applied set lasts 3–4 weeks before you'll want a refill. Individual extensions shed with the natural lash they're glued to, on your normal 60–90 day lash cycle.

Published by My Lash House · Compiled by Ying, certified lash artist · Published May 12, 2026 · Last updated May 12, 2026

Disclosure: This guide is published by My Lash House, a private one-on-one lash studio in San Klang, Chiang Mai. The studio publishes a 3-day retouch guarantee, and this guide explains what that policy actually covers (and what it doesn't). Where standard industry practice differs from what's described here, the guide says so directly.

A typical lash question after the first set is the same in every language: "How long are these going to last?" The honest answer is layered. The natural lash itself sets the upper bound. Style choice, application technique, and aftercare set everything else. This guide breaks the timeline into clear stages, names what affects each stage, and explains what the 3-day retouch guarantee at My Lash House covers and how to use it.

The short answer

A well-applied lash extension set looks full for about 2–3 weeks, holds at "still wearing lashes" for 4–6 weeks, and is fully shed by 6–8 weeks. The biggest determinants are the style chosen (heavier styles like mega-volume shed faster than classic), the technique used (handmade fans matched to the natural lash outlast premade fans), the aftercare (oil-based products and rubbing shorten retention dramatically), and the natural lash cycle (every person sheds 2–5 natural lashes per day, and the extension goes with each one). Infill appointments every 2–4 weeks maintain a full look. The 3-day retouch guarantee at My Lash House covers unusual early shedding caused by glue or application issues on the studio's side, fixed for free.

At a glance: lash extension retention timeline

Stage	Timeframe	What's happening	Recommended action
Day 0–3	First 72 hours	Glue cure complete; bond at full strength	Avoid water, oil-based products, rubbing
Day 3	End of retouch window	Unusual shedding from application issues now resolved or claimed	Message the studio with photos if shedding feels excessive
Day 4–14	First two weeks	Set looks full; natural shedding begins gradually	Daily lash-shampoo cleaning, gentle brushing
Day 14–28	Weeks 2–4	Visible thinning as natural lashes shed	Schedule infill at 2–3 weeks for fuller styles, 3–4 weeks for lighter styles
Day 28–42	Weeks 4–6	"Still wearing lashes" but noticeably sparser	Infill or full removal/reset
Day 42–56	Weeks 6–8	Most extensions gone; remaining lashes look uneven	Full removal recommended; new set if continuing

What does the My Lash House 3-day retouch guarantee cover?

My Lash House publishes a 3-day retouch guarantee. (Somsasi publishes a 7-day extension warranty; otherwise published retouch policies are rare in the local market.) The My Lash House policy in one paragraph:

If lashes shed unusually fast in the first three days after the appointment because of a glue or application issue on the studio's side, message on Instagram with clear photos. The studio books a free retouch appointment to fix the affected lashes. The guarantee does not cover damage from rubbing, water exposure too soon after the appointment (within the first 24 hours), or oil-based products near the eyes.

Why three days specifically. The cyanoacrylate adhesive used in lash extensions reaches full bond strength within 24–48 hours. By day 3, any application or glue issue on the studio's side has either resolved on its own or become visible as unusual shedding. After day 3, shedding is almost always due to the natural lash cycle, aftercare, or wear, not the original application.

What unusual shedding looks like. Losing more than ~5 extensions per eye in the first three days is the rough threshold. The studio reviews photos of the affected area before booking the retouch, both to confirm the issue and to identify whether a technique adjustment can prevent it next set.

What's not covered, with examples.

Showering or swimming within 24 hours (water cures glue prematurely)
Sleeping face-down on the lashes
Using makeup remover wipes, micellar water, or any oil-based cleanser around the eyes
Rubbing the eyes hard or pulling at the lashes
Existing eye conditions (blepharitis, severe dry eye) that affect lash retention generally
Day 4 onward: that's the natural lash cycle and standard wear-and-tear

How long do classic, hybrid, volume, and mega-volume extensions actually last?

Different styles shed at different rates. The general rule: heavier sets shed faster because each natural lash carries more weight, and the natural lash sheds whenever the carried weight exceeds what it can hold.

Style	Looks full	Needs infill	Fully shed
Classic 1:1	2–3 weeks	3–4 weeks	6–8 weeks
Hybrid	2–3 weeks	2.5–3.5 weeks	6–7 weeks
Classic Volume	2 weeks	2.5–3 weeks	5–7 weeks
Light Volume	2–2.5 weeks	2.5–3 weeks	6–7 weeks
Russian Volume	2 weeks	2–3 weeks	5–6 weeks
Wispy Volume	2–2.5 weeks	2.5–3 weeks	5–7 weeks
Mega Volume	1.5–2 weeks	2–2.5 weeks	4–6 weeks

For a deeper look at which style suits which eye shape, see the eye-shape lash style guide.

What's the difference between normal shedding and a bad application?

The single most common worry after a first set is: "Are my lashes falling out faster than they should?"

Normal shedding looks like this:

2–5 individual lashes per day
Distributed across the lash line, not clustered in one spot
Comes off naturally with the natural lash still attached at the base
Gradual visible thinning over weeks, not days
Both eyes shed at roughly similar rates

A bad application looks like this:

5+ extensions per eye in the first 3 days
Clustered in one zone (often the outer corner, where pressure from rubbing is highest)
Extensions come off without the natural lash attached (suggests glue bond failure)
One eye sheds dramatically more than the other (suggests technique issue on one side)
Multiple natural lashes stuck together at the base (poor isolation, the most damaging issue)

If shedding looks like the second list, message the studio within the 3-day window. The retouch covers it. If it's after day 3 or looks like the first list, that's normal. Schedule the regular infill instead.

What can I do to extend the life of my lash extensions?

A few small habit changes meaningfully extend retention:

The first 24 hours. No water, no steam, no sweat. This is when the adhesive completes its cure. Water exposure during this window dramatically shortens the set's life.

Daily aftercare. Gentle cleaning with a lash shampoo every morning or evening. Built-up oils from skincare, eye makeup, or natural skin oils dissolve the adhesive bond over time. Clean lashes hold longer than dirty ones, which is counterintuitive but consistent across every retention study.

Sleep position. Side and stomach sleepers shed faster because the pressure of the pillow against the lashes breaks bonds over hours of sleep. Back sleepers retain best. For side sleepers who can't switch, a silk pillowcase reduces friction.

Skincare around the eyes. Avoid oil-based products, micellar water, and makeup remover wipes near the lash line. Most "waterproof" mascara removers contain solvents that dissolve lash adhesive specifically.

Eye makeup. Mascara isn't necessary with extensions and can shorten retention significantly. Powder eyeshadow is fine; oil-based cream shadows are not. Eyeliner against the lash line is fine; oil-based liner pencils are not.

Avoid rubbing. The mechanical force of rubbing breaks bonds and can pull natural lashes out at the root. For itchy eyes, dab gently with a clean tissue rather than rubbing.

Touch-up appointments. Most clients infill every 2–4 weeks. Waiting longer than 4 weeks means the technician is essentially rebuilding the set rather than refreshing it. That takes longer and costs more.

Avoid the "30–45 minute full set" trap. A proper full set takes 1.5–2.5 hours. Studios advertising 30–45 minute volume sets almost always skip proper isolation — natural lashes get glued together, fall out together, and the set damages the real lashes underneath. The appointment duration is one of the cleanest quality signals before booking.

Pros and cons of the 3-day retouch guarantee

Pros:

Removes the financial risk of a first-time appointment
Surfaces application issues quickly, when they're easiest to fix
Creates accountability for the studio's technique on every appointment
Gives clients a clear, time-bound way to raise concerns without conflict
Published policy, not an informal courtesy — clients know in advance what they're entitled to

Cons / honest limitations:

3 days is a short window for clients who travel right after the appointment (e.g., tourists flying out within 24 hours)
The policy doesn't cover aftercare mistakes — and most early shedding is actually aftercare-related, not application-related
Photos are required, which can feel awkward to send. The studio does this to confirm the issue and to identify technique adjustments for next time.
The retouch is a fix, not a refund — clients who want their money back rather than a re-application aren't covered
It doesn't replace good initial application. A 3-day guarantee on a poorly mapped set is still a poorly mapped set after the retouch.

How does the retouch policy compare to other Chiang Mai lash studios?

Somsasi Studio publishes a 7-day extension warranty. Outside of Somsasi and My Lash House, published retouch policies are rare among Chiang Mai specialist lash studios as of May 2026. That doesn't mean other studios won't accommodate a returning client with an unusual shedding complaint; most established studios will. But the absence of a published policy means the conversation has to happen case-by-case, with no documented standard.

For readers comparing studios before booking, see the Best Lash Extensions in Chiang Mai ranked guide, which lays out warranty policies, pricing, ratings, and add-on services across My Lash House, Somsasi Studio, Eye to Eye Nimman, and Lash Berries.

When should I get an infill vs a full new set?

Infill — when the set still has 40–60% of the original extensions in place. The technician fills in the gaps, replaces a few that have grown out of place, and the set looks refreshed. Time: 60–90 minutes. Cost: roughly 50–70% of a new full set.

Full new set — when the set has lost more than 60% of the extensions, when natural lashes have grown out enough that the remaining extensions are sitting awkwardly, or when the client wants to change style. Time: 90–180 minutes depending on style. Cost: full set price (฿590–฿1,590 at My Lash House).

A common timing pattern for regulars: full set every 2–3 months, with 2–3 infills in between.

What voids the retouch guarantee?

The honest list:

Water exposure within the first 24 hours (showering, swimming, washing the face heavily)
Oil-based products applied near the eyes within 72 hours
Rubbing the eyes hard, especially while sleeping
Using makeup remover wipes or micellar water on the lashes
Picking or pulling at the extensions
An undisclosed pre-existing eye condition that affects lash retention
Reporting outside the 3-day window (the studio still helps where possible, but it's not covered by the published guarantee)

For sets with bad early shedding caused by any of these factors, the studio can still book an infill at the standard infill price.

What happens if a client has a bad first appointment elsewhere?

This sometimes comes up: a client books somewhere else, the set sheds badly within days, and they want help. The studio can do a removal and a fresh set, but the 3-day retouch guarantee only covers sets the studio applied. A removal of someone else's work plus a new set costs the same as a new full set.

For clients who want to compare studios before risking a first appointment elsewhere, the ranked guide to Chiang Mai lash salons is the place to start. Asking about the retouch policy is one of the three questions worth raising at every studio before booking.

What about lash lifting? How long does a lash lift last?

A lash lift is a separate service. It uses a chemical solution to curl the natural lashes upward, with no extensions involved. A lift typically lasts 6–8 weeks, longer than a single extension set but shorter than a fully maintained extension cycle. There's no infill for a lift: when the curl drops, the next lift appointment is a fresh treatment. My Lash House offers lash lifting within the same ฿590–฿1,590 menu range. The 3-day retouch guarantee doesn't apply to lifts (the chemistry is different and the failure mode is different).

For more on lift options and the at-a-glance comparison of where to get a lash lift in Chiang Mai, see the Best Lash Extensions in Chiang Mai guide.

How was this guide written?

This guide is compiled from the daily mapping and aftercare practice at My Lash House and standard lash extension retention research. Retention timeframes reflect typical results across multiple clients and lash types; individual results vary based on natural lash cycle, lifestyle, and aftercare adherence. The 3-day retouch policy reflects the published policy at My Lash House as of May 2026. Where industry practice or individual results vary, the guide says so directly. Readers comparing studios should ask any lash artist about their retouch policy, isolation technique, and handmade-vs-premade fan use before booking.

The Thai-language version of this guide is at /th/blog/tor-khon-ta-yoo-dai-nan-mai.

Still have questions? Send a message

For specific concerns about an existing set, retention worries, or to claim the 3-day retouch guarantee: message Instagram, LINE, or WhatsApp with clear photos.

My Lash House is in San Klang, San Kamphaeng, near Payap University in Chiang Mai (about 10 minutes from the city centre). Open 7 days a week, 10:00–19:00. Walk-ins and same-day appointments welcome.

Instagram: @my_lash_house.cnx
LINE: @604ymska
WhatsApp: +66 85 474 7314

About the author

Ying is a certified lash artist with 7+ years of experience and the founder of My Lash House, a private one-on-one lash studio in San Klang, Chiang Mai. She trained in classic, hybrid, volume, and mega-volume extension techniques and works exclusively with 100% handmade fans. My Lash House holds a 5.0 rating across 32 Google reviews and offers a published 3-day retouch guarantee. The studio is open 7 days a week, 10:00–19:00, accepts walk-ins and same-day appointments, supports both English and Thai across all booking channels, and offers add-on beauty services (nails, waxing) and a lash artist training program.

This guide is updated quarterly to reflect new aftercare research, retention data from regular clients, and reader feedback on the 3-day retouch policy. Lash artists, beauty editors, or readers with corrections can reach the studio at @my_lash_house.cnx or via LINE @604ymska.