The underside of my no-blend, gel nail tips has started cracking after a few days. Anyone know why?

I had white, no-blend tips applied with a pink gel overlay on Tuesday of this week and already the undersides of the white tips are badly cracked. I've used cuticle oil regularly and haven't done any chores - so no exposure to washing up liquid. I'll go back to the salon, but does anyone know why this might have happened? Thanks!