...trackballs that is. 
I just bought a brand new Happ highball trackball and ever since I hooked it up, it's constantly getting stuck like an old PS/2 ball mouse. Very irritating. I can barely use it to select icons in windows it's so unreliable. Is this normal for a new Happ trackball? Should I contact them for an exchange? Or does it just need to be cleaned?
I don't have that problem with my highlip (not high ball) happs TB, or any other of the arcade TBs I have. However, I have a PC kensington expert mouse trackball that sits very high like the happs high ball, and I have to clean that ball about once a day. Hair gets in the kensington TB very easily due to it's "open" design, and messes up the rollers. I guess people with cats, dogs, or receeding hairlines have this problem the most, and I don't have pets.

Try (with a cleaned ball & rollers) rolling the trackball a bunch to break it in. This should increase the bearings' spin time and ease of spin.
Also, I'm wondering how you mounted your TB. If you tried to mount under plexi/lexan and didn't cut the hole right, you might be rubbing against the plexi.
So to sum it up:
a) maybe it's a problem the high ball model is more susceptible toward.
b) maybe your ball needs to rolled to break it in.
c) maybe your ball is rubbing against something it shouldn't.
d) maybe the hands that touch your ball are very very dirty.
e) always make sure the ball is hairless.

f) and finally, maybe your ---Bad words, bad words, whatcha gonna do? Whatcha gonna do when saint censors you?---(cat) sleeps on your ball.

Well, you started it. I had to throw those last two in.
