I say this because i have just used a new brush to apply my under eye concealer. My instinct is to wash it. I did actually wash it with some soapy and water. I cant imagine me doing this everytime but i have never used a creamy thing with a brush if you know what i mean! Im fine not washing powder on brushes as you can kind of dust and shake it off. What do you do with cream things on brushes. Do you wash them everytime?