i just recently started using brushes to apply my makeup. what do i do if i dont use the same color blush everyday. would i have to clean the brush with soap and water after every use? b/c with foundation and powder, i use the same kind so i wash them every 3 days. what do i do when caring for the blush brush?

I bought an expensive blush brush and would like to keep it for awhile.
I know that it is important to wash the fibers, but how?
Also, should I be washing out the sponge applicators that I apply eye shadow with?
Thanks for your help.

What is the proper way to dry them?