Revive slightly dried mascara, gel liner, or cream shadow with saline solution. The recommended length of time to keep a mascara and gel eyeliner before tossing is three months; cream shadows are about a year. But if they get a little clumpy before their expiration dates, squirt a few drops of saline solution into their formulas to refresh them.
17 Genius Hacks for Saving Every Last Drop of Your Beauty Products
Fix a crushed eye shadow (or any other pressed powder) with rubbing alcohol. Pour the rubbing alcohol into the product until the crumbles become a paste. Then, press them back together with the back of a spoon or your clean finger. Once the alcohol evaporates, your product will be solid again and ready for use.