I ended up buying the RCBS 1500 scale/dispenser combo yesterday and so far I love it! My question is about cleaning out the residual powder that is left at the very bottom of the cylinder. I can get most of it out with the little brush that was included with the unit, but there is still a good portion of stubborn particles that I cant get out with a brush. Any suggestions? I plan on using several different types of powder with this unit and dont really want to find out what happens if they get mixed together. I was thinking maybe canned air? Anything else?