It sucks, but sometimes products can go bad sooner than they’re supposed to, even if you follow our advice. Here are some telltale signs it’s time to toss:

It smells: If your product doesn’t smell the same as when you purchased it or just smells bad, it’s time to trash it, says Kim. After all, perfume that smells like dirty feet is not exactly a turn on.

It separates: Another sign your product is off? If it starts to separate, like your salad dressing. But unlike your salad dressing, the directions don’t say anything about shaking the bottle.