I love this little trick that I learned about years ago!
With a little alcohol (the rubbing kind) and a butter knife you’ll never have to throw out a broken blush or eyeshadow ever again. Add a few drops of rubbing alcohol directly to the broken, dusty pieces of makeup until it’s soft. Then, take the butter knife and spread it across the container so it’s flat and smooth. Within a day or two days the alcohol will completely evaporate. When completely dry it’s good as new and ready for use.
(photo courtesy of ybskin.com)