If you are using q-tips, your fingers or those dinky little brushes that you get in blush/eyeshadow palettes
we need to upgrade you!
Brushes help colors go on more smoothly and keep the oils from your fingers out of your powder shadows and blushes.
To clean them I recommend dishsoap for synthetic brushes and either baby shampoo, your shampoo or your cleanser for
natural fiber brushes.
The reason I love synthetic brushes so much is that they're really soft in texture, they don't absorb pigments they way natural brushes do
and they're anti-bacterial.