Let’s break down this 3-week retention case study. This client came in right on schedule for her 3 week fill and qualified for a fill based on retention. From a 50/50 perspective, here’s what contributed to the outcome: Service factors: • Proper prep • Isolation & placement • Adhesion control • Sealant application post-set Client factors: • Cleansing routine • Oil exposure • Sleep habits • Friction & maintenance Retention is never one-sided. Strong fills are the result of both technical execution and client aftercare consistency.

We’ve spent time talking about adhesive and environment, but retention issues aren’t always technical. Client habits, aftercare, and lifestyle play a role too — and that’s where a lot of frustration happens. I’ll be shifting into retention behaviors + expectations next. If there’s a specific issue you want covered, feel free to drop it below.

It’s brick out here in Philly 🥶 This lash adhesive’s minimum humidity is 15%, and my hygrometer was reading 16–20%, which is the very low end of its workable range. At the bottom of the range, adhesive will still work — but it typically cures slower and relies more heavily on proper temperature support. Because my studio temperature was originally around 48°F, I used a space heater to bring the room into range. As I continued lashing my client, I noticed the adhesive did cure and bond quicker once the temperature was adjusted. Humidity still played a major role in overall performance, but this is a real example of how temperature and humidity work together, not separately. See below for a closer look at the adhesive’s storage conditions (humidity & temperature).

New mini lesson is up in the classroom I broke down tools used based on adhesive behavior — when to use them and why, instead of guessing or switching glue. Have you ever used a humidifier or dehumidifier in your lash room? If so, what changes did you notice? And if there’s a lash topic you want me to cover next, feel free to drop it below. This is an open learning space✨

Welcome to VIP 💜 If you’re here, you’re early — I appreciate you! VIP access means deeper lessons, real breakdowns, and ongoing education from my experience behind lashes. Make sure to start in the Classroom with the Lash Adhesive Foundations lessons, and feel free to jump into discussions or suggest topics you want covered next.