Dirty Makeup Brushes Carry Bacteria and Will Not Give You a Flawless Look
Whatever you do, don't use the same makeup brushes day in and day out without
washing them. Aside from harboring bacteria, makeup pigments bind with the oils
from your skin, making brushes sticky and dirty. Makeup colors can change,
becoming darker or more orange due to oxidation and to mixing with skin oils or
dust, making a mess of your daily makeup routine. Clean your brushes once a week
to keep them working properly, and if a brush becomes stained or misshapen,
throw it out and get a new one.