How Heat & Humidity Affect Lash Retention
- thelashcook
- 5 days ago
- 3 min read
Summer can be one of the trickiest times of year for lash retention. As temperatures rise, so do humidity levels, sweat, oil production and time spent outdoors. If you've noticed your clients returning with fewer lashes than usual, the weather could be playing a bigger role than you think.
Why Does Heat Affect Lash Retention?
Heat itself doesn't make lash extensions fall off, but it can impact the factors that influence retention.
During warmer weather, clients tend to:
Sweat more
Produce more natural oils
Spend more time swimming
Touch or rub their eyes more frequently
Use oily SPF and skincare products around the eye area
All of these can affect how well lash extensions stay attached to the natural lash.
How Humidity Impacts Lash Adhesive
Humidity plays a huge role in how lash adhesive performs.
Lash glue cures using moisture in the air. When humidity is too low, adhesive can cure slowly. When humidity is too high, adhesive can cure too quickly.
If your glue is not being used within its recommended humidity range, you may experience:
Poor retention
Stickies
Increased shock polymerisation
Always monitor your lash room temperature and humidity and ensure your adhesive is suitable for your working environment.
Sticky Toffee Lash Glue features a 0.5 second cure time, thin consistency and performs across a broad humidity range, helping lash artists maintain consistent retention throughout the year.
Summer Retention Tips for Lash Technicians
1. Monitor Your Environment
Use a hygrometer to track humidity and temperature in your lash room.
2. Adjust Your Adhesive
Different adhesives perform best in different conditions. Check your adhesive's recommended humidity range and adjust if needed. maybe switch to a slower setting glue if you feel like your glue is setting too fast.
Our sticky toffee lash adhesive has a wide humidity range (35-85%) and works in all temperatures.
3. Focus on Lash Preparation
Proper cleansing and preparation are essential all year round, but especially during summer when natural oils increase. encourage your clients to wash their lashes just before coming to their lash appointment.
4. Educate Clients
Many retention issues happen outside the salon. Make sure clients understand the importance of:
Daily lash cleansing
Avoiding excessive touching
Keeping lashes clean after swimming
Managing oily products around the eye area
5. Choose Quality Lash Trays
Poor quality fibres can make creating strong, clean fans more difficult.
Our 0.03 Volume Lash Trays are ideal for lightweight Russian and Mega Volume sets, while our 0.05 Volume Lash Trays are perfect for fluffy Russian Volume and Hybrid sets. Both feature ultra-black fibres, a soft matte finish and easy fanning strips to help create beautiful sets with confidence.
Summer Retention Tips for Clients
Want your lashes to last longer this summer?
Clean your lashes daily
Avoid rubbing or picking at extensions
Pat your face dry after swimming
Keep SPF/oily products away from the lash line
Attend infill appointments every 2-3 weeks
Remember, lash extensions naturally shed alongside your natural lashes, so some lash loss is completely normal.
The Bottom Line
Summer doesn't have to mean poor retention.
By understanding how heat, humidity, sweat and oils affect lash extensions, both lash technicians and clients can make small adjustments that help lashes stay fuller for longer.
With the right products, proper preparation and good aftercare, good retention is possible all year round.
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