Why do people keep nail polish in the fridge?
Refrigeration reduces solvent evaporation and pigment caking and settling.
to keep it fresh
Because it gets rid of the lumps on the brush when you take it out of the 'jar.'
Well, I personally don't keep nail polish in the fridge. It's to make sure there are no clumps & from drying out. Correct me if I'm wrong here.
To keep it preserved longer