Thanks. Glenn, I thought I had cleaned all the MM out with water and windex so I gave it a cleaning with lacquer thinner. I always thoroughly clean with water at the end. When I went to shoot the green on my George, nothing would happen. I stripped the tip completely and there was a bunch of gummed up MM on the needle and in the spring. I threw everything into a small container of lacquer cleaner, let it soak and then cleaned up with a toothbrush. I'll order the appropriate thinners when I get home