How often should you clean them?
There’s no such thing as clean brushes that are too clean – the more you wash them the softer they become.
General guidelines are:
Foundation brush – Once a week
Powder and Bronzer Brushes – Once a week
Blush Brush – Once a week
Eye Shadow Brushes – Every 2/3 days
Eyeliner Brush – After every application
Sensitive eyes are very prone to irritation and infection, so always try to use a freshly cleaned brush – especially if applying on the inner eye sealant.