This week's question comes from Lorie, who asked the following:
"Does nail polish expire?"
Well, nail polish is best used no later than 24 months/2 years after opening it. Although safe to use after that time period, you shouldn't expect the perfect color, consistency, overall look or ease of application.
Once a bottle is opened, some ingredients will begin to evaporate, causing the nail polish to thicken, separate or even dry out.
The great thing about nail polish is that you do not have to fear it going "bad" with bacteria after opening it because the solvents are chemically hostile to microbes.
I hope this helps.