From my experience in lash extension application, one of the most common yet overlooked mistakes that cause poor retention is skipping proper prep of the natural lashes. Many clients don't realize that their own lashes need to be clean and free from oils or residue before the extension process begins. When natural lashes aren't prepped properly, the adhesive struggles to bond well, resulting in lashes falling out sooner than expected. To enhance retention, I always start by thoroughly cleansing the lashes using a gentle, oil-free cleanser and sometimes a primer designed specifically for lash prep. This step removes any build-up and primes the lashes for better adhesion. Additionally, environmental factors and aftercare play a key role. I advise clients to avoid steam, oily makeup removers, and heavy creams around the eyes immediately after their appointment. These can weaken the bond. Also, refraining from rubbing or pulling on the lashes helps maintain their longevity. For lash artists looking to up their game, mastering lash prep techniques can significantly boost client satisfaction and reduce infills or touch-ups. Investing time in education about all 30 ways to improve lash retention, including proper isolation, lash selection, and adhesive curing, is invaluable. Remember, lash extension retention isn't just about the application; it starts even before with correct prep. Avoiding that one critical mistake can save clients unnecessary lash loss and improve the overall lash extension experience. If you're passionate about lash retention and want to perfect your technique, focusing on preparation and aftercare advice will build your reputation as a skilled lash technician and keep your clients coming back happily.