Could it be their nails?

[Lilymayc]

I'd tell them the first repair is free and during that appointment discuss what could have caused it and point out aftercare again.

Thank you, what do you give for your aftercare?

 

[Cindy2021]

I sell a solar oil and just advise them what not to do

 

[Opinaillove]

So i bet it chipped and she picked at it....

It could be from a lot of things... Baby wipes, cleaners, washing dishes etc... Maybe try a bonder on the people who are harder on their nails... I have to do that with some of the nurses who's nails I do.