I powdered multiple colors last weekend and I blew out my gun after every color. Just as I was about to put it up I notice some residual powder in the gun. I started inspecting it and remove the short and long tubes and the white cap that is screwed to the gun. I blew it out and all sorts of colored powders came out of hiding. I think this is what has caused me some cross contamination with my colors as well as clear. My question is how do you guys clean your Pro-Guns between colors?