make-up brushes. There is so much make-up that can get built up in the brush, which of course makes for a ton of bacteria and build-up...eww!
Put a tablespoon of white vinegar into a cup of hot water. Place the brush (or brushes) in the mixture for twenty minutes. Rinse under hot water after the soak and then rinse once with cold water. Pat dry into a paper towel or towel. That's it! How easy does that sound?
This will disinfect the brushes as well as get the grease, film, and it's super inexpensive. You are going to be shocked by the amount of "gunk" that you see remaining in the water!