Using the mask outside the expiration date is not the best idea. It can form groups and seem messy, but the worst is that it can actually contain bacteria. How disgusting
Although you cannot save the old mascara, there are several ways to use a mask stick. All you need to do is thoroughly clean with a little detergent for a warm meal) and let it dry. Now you have an eyebrow brush! You can also use it for combing groups on eyelashes or for releasing make-up products before use.