When it comes to makeup, mascara is my staple. A general rule of thumb is that you should bin your mascara every two to three months.
While you may not have gotten to the end of the tube, it needs to be tossed for a good reason. Every time you put your mascara brush back into the tube, you’re injecting germs straight into the formula. This can cause your mascara to clump up, giving you spidery looking lashes. Nobody wants that.
Mascara has the shortest life span of all make up because the risk of transferring bacteria back and forth from your eye into the mascara tube is so great. If your mascara starts to dry out before its 90 days is up, throw it away. Don’t add water or saliva to your mascara to rewet it. Doing so will only increase your chances of getting an eye infection
So as I already said, masacara should be kept no longer than three months after opening. After three months, bacteria can begin to grow inside the tube; this growth of bacteria can lead to an infection. A strange or foul odor from your tube of mascara is another sign that your tube has expired. If you notice that your mascara appears flakey or is caking up, discard of it.
You should also replace your mascara if you contract any type of eye infection; such as, conjunctivitis (pink eye). This will prevent you from becoming reinfected. It is also not a good to share your mascara with others. If you suspect that you are having a bad reaction after you have applied your mascara, please remove the mascara, discard of the tube and consult your physician.