I am not ashamed to admit that my dermatologist is a great friend of mine ( we became great friends because I see him so often, haha) He always reminds me to wash my face twice a day & my make-up brushes at least once a month. Taking care of your skin is so important! Taking proper care of your make-up brushes is equal to that. Cleaning them properly will extend their lifetime, help their performance and prevent bacteria from forming, which could lead to breakouts. Of course you are still going to have break-outs every once in a while but doing this will help prevent them from being so bad. I use Sephora’s Daily Makeup Brush Cleaner; it only takes a few minutes & in the long run will save you money & save your skin.