I will try and start from light colors to dark colors. Ex: White, yellow, orange, red, blue, black
I take 1 paper towel rip it in half and clead my brush that way. I then spray out the excess on my paint booth.
Ill add a darker color and spray the airbrush until I know the new color has taken over.
I used to clean very thoroughly with cleaner and q-tips but I was taking way to long to clean just to dump more paint in the brush. My new method works like a charm.