This tip is so simple that I almost feel like a criminal for even sparing one whole post for it. I think the picture even says it all. Basically, like every other beauty nut, I tend to have more than one mascara tube open at a time. As such, it’s hard for me to keep track of their “expiration dates.” Most mascaras expire 3 to 6 months after the tube is first opened, and while some tubes helpfully state what particular time frame the mascaras should be kept, I doubt that we all remember when we first opened that delicious tube.
Writing down the date when you first opened the mascara can help with hygiene. The washi tape just helps with cuteness. As we can see here, October 2013 was a great month for mascara sampling for me. Sometimes, you can go with smelling the mascara (Too funky? Too bad to use!) but I think this is a more accurate way to do things.
Here is the why: Mascara is one of the beauty products notorious for going bad really easily. You need to replace them quickly because bacteria breeds inside the tube and close, constant contact with your eye exacerbates this (moisture is the essence of wetness, and so on).