How to clean brushes; I did this to my blush brush...no wonder my cheeks break out so much!! GO DO THIS RIGHT NOW! You will be amazed at how clean and soft and nice-smelling your brushes will be. Make-up brush diy cleaner: 1 cup warm water + 1 TBSP vinegar + 1 TBSP dish soap. Swirl swirl swirl. Rinse. Reshape and dry overnight!