Blending Brush A Separate Blending Brush For Each Pack Of Eyeshadows?

A separate blending brush for each pack of eyeshadows? - blending brush

Hello! Further questions to the make-up already! I bought a few packs of Maybelline Eye Shadow Quad in different tones. I bought a brush with the mixture. So I would say the purple shadow using one days and mixed with the brush, then the next day I would like to use browns. Should I wash the brush before using it with brown? Or even play a role? Or I should have a separate brush for each package? $ $ $ Thanks!