So I've found that I can not play games with an onscreen joystick for more than maybe 10min. After a bit the touch screen starts to become less responsive. I think its due to oil build-up, but I'm not sure.
I've tried both cleaning the screen and washing my hands before playing, but it doesn't seem to have much effect in how long I can play. Anyone else have this problem? I did some searching, but it seems my grep-foo is off tonight =/
Edit: I'm on an OG Droid.