Yeah i had this problem for a while and it was really annoying, i would have to jab the throttle just to unstick the pedal. What you can do if i remember correctly is adjust your idle screw to where it would be idling higher, so that the initial position of the butterfly or whatever is past the point to where it used to stick. If this fixes the problem, then you'll know that it was in fact the sticky butterfly in the TB. So just clean that up so that it wont stick anymore, adjust the idle back down, and you'll be good to go.
Other than that you can always make sure the cable isn't getting crimped anywhere etc.