I had lashes put on a few weeks ago, but fairly quickly realised they're not for me. Made my eyes look very bloodshot, made my eyelashes sore (a bit like when you have your hair brushed to one way for a few days & then brush it the opposite way, the roots are sore) & hated the fact that i couldn't rub my eyes in the morning due to not wanting the lashes to come off during my morning rub !!
I managed 2 weeks before i decided to take them off, the bloodshot & soreness was too much for the added effect.
I had them on with the idea to see what they're like to possibly consider doing it part of my treatment list. Decided against it, too much faffing for my liking, esp knowing that the clients i see now wouldnt look after the lashes like the tech who put mine on told me to.
I hope you manage to get on top of the issue with your client.