ok, maybe it's not the 54th problem in my life, but it drives me nuts when this happens:
when i first started to
try and be like my mom and look good wearing makeup but failed miserably because no one taught me blue eye shadow was wrong wear makeup, i would throw away containers if this sort of thing happened. whether they were dropped and cracked or just all used up, i didn't think there was a way to salvage them. then i found out that alcohol could solve my problem! rubbing alcohol, that is. not drinking alcohol (otherwise, i might end up wearing blue eyeshadow again)
all you will need: rubbing alcohol, a bobby pin (to mix) and a spoon (to smooth)
first, grind up the makeup so it's covering the bottom of the container
second, pour alcohol into container and mix/stir with bobby pin. it's going to be lumpy, bumpy and gross. that means you did it right.
third, remove the bobby pins and let your makeup sit for a few hours so the alcohol has time to evaporate. after about 3 hours, take your spoon to the surface and smooth out the lumps. if possible, wait over night before using the makeup.
pretty simple, no?