My actual joystick itself hasn't frozen but it would stick until I did a clean/lube/fix to the valve control block under the right floor board. If you search past posts, others have had to do the same. The two joystick cables enter the control block from the rear. On the front of the block, in line with the cables, you'll see two @2" long by 1" diameter aluminum caps with each held on by two allen head screws. The end of the valve spools, their centering springs, and the detent balls for the float function are here. Mine had moisture and some corrosion which froze in Winter. I took the caps off, cleaned, and greased. When I reinstalled the caps, I put a very small amount of silicone seal on the mounting face of the caps. I've never had a problem again. When you pull the caps, no parts go flying so it's a simple job. Just a thought in case it's more than just the joystick.