Roll the nail polish
First of all don't shake your nail polish, it creates little air bubbles when you apply polish to your nails. Instead gently roll your nail polishes between the palms of your hands before using them.
OPI nail polish thinner
Do not add nail polish remover to your nail polishes. Nail polish remover is made to remove the polish, not to thin it out. Pouring nail polish remover to your nail polishes creates the polish to separate. Try using nail lacquer thinner by OPI. A few drops to the nail polish does the trick.
