hi,I know that we always said 2 weeks for infill nail extension but to day have a client ring and said all her name come off!!then she came to my salon and all nails still on.But at bottom of the nails is not completely lift.it look like when u see people back for infill still on but bottom got yellow underneath.She do nails with me around 10 days til today.she said she have it done before and its on 3-4 weeks!!!How long we can confirm to free fix and make sure that is not cos our fault??