Eye drops
For those of us with easily irritated eyes (maybe you work out in a dry, dusty environment, or you’re prone to allergies), eye drops can be a lifesaver. It’s tough to get on with your day if you can’t stop rubbing your eyes. However, if you don’t keep an eye on how long you’ve been using your bottle, then it can cause more problems than it solves.
Eye drops are only sterile for 4 weeks. Then they lose their benefits, and can actually end up causing an eye infection. Definitely the opposite of why you bought them in the first place. Perhaps the best idea is to write on the side of the bottle when you first opened it.