I recently changed over to Wildlife paints and I purchased a Harder Steenback airbrush and I only intended on using this airbrush for the halos and spots on brown trout. The 2 work together pretty well painting halos but when I use the brush with the Burnt Umber after a few spots the cap flies off. My face covered in freckles I take the brush apart, clean everything, try it again and it's just rinse and repeat. The one thing I noticed about these paints is they are very sticky. Somehow the paint is flowing back into the push button area as well. This is a brand new brush. I tried thinning the paint a little but it seems like the brush is able to separate the colors from the thinning material as you'll see a clear spot with a thin line around it. It's frustrating. Any idea on what the issue(s) might be?