Esky HBFP tx problem

Nuttcaze, I pm'd you this on youtube, I figure I'll put it in it's rightful place,

I've been having some tx problems, after I fly about 5 mins or so, after I have to go up to about 60-70% or so on the throttle to keep it in the air, I've noticed that the pot on the throttle stick is twitchy, I can barely touch the throttle stick, even just yaw correcting and the rpms will shoot up then drop back down, I've tried spraying some contact cleaner/lube that I got from radio shack into the pot itself, it helped alot for a while, but now the problem has returned, just not as bad as it was before. Have you had this problem on any of you honeybees, and how did you fix it if you did.