Go to Home Depot, Lowe's, etc., and buy a pack of soft, round rubber bumpers used around the house to protect surfaces that get bumped by doors, such as the edge of a washroom countertop that gets bumped by a fully opened door. They're little clear, soft, self-sticky doodads about the half the size of a pencil eraser. Stick one on the lock switch ... you'll be able to find it by touch in the dark every time, and it will stay where you stick it. Good luck, Mate.