Sometimes my nail polish feels like it never dries. Does that mean it's old?

yah it old

um i dont think it ever weres out inless it turn a funny looking color

Yeah - it's too thick. Keep polish in the refridgerator to keep them thin so they'll last longer. It depends on how often you use it as to how long it lasts...I don't keep mine for more than a year.

when it's thick it means it OLD.

umm, well i have diff nailpolishes. some take more time then others but they're used only 3-4 times. so that wouldn't be old.

Nail polish last for more than a year...if you put them in the right place. When it's time to throw them away, you will notice a change straightaway. Maybe there could be a lot of water in the bottles. Basically, you will notice a change.

p.s-the year span actually depends on the quality of the nail polish.