I only just clued in that using expired facial products can cause blemishes. Not washing makeup brushes can cause them, too. If you're reading these points and going, "Yeah. Duh." Well, I apologize. I guess you're better than me. In any case, writing the dates on when you buy products is such a smart move. I'm surprised I didn't read about this in Martha Stewart, to be honest. Though, to be fair, Real Simple, is considered a poor man's Martha Stewart to anyone with an ounce of intellect.
Start doing this! It'll change your life! Or, at the very least, it'll make you feel like you're becoming less gross. Also, I've found this especially works well with nail polishes. (The question of whether or not a nail polish ever really expires or goes bad is up for debate, but truthfully if I bought a certain bottle of nail polish eight years ago that has gone unused for that amount of time, then maybe it's time to spice things up and possibly buy a new colour? Just a thought.)
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