On the top cover of the controller, locate the green portion of the motherboard.

Loosen and remove the 1 screw in the upper left side of the green motherboard.

Turn the green motherboard over and attached to the motherboard will be the yellow c-stick.

Firmly, but carefully, pull the c-stick off, and clean around the area before reattaching or replacing the c-stick.

After cleaning or replacing the c-stick, reattach the green motherboard piece to the orange motherboard piece.