My driver's belt is still squeaking even after the tech tried to spray something into the wall socket. What silicone can I get to try this again, the brand name and what it comes in, tube or spray can? Won't the spray damage the actual belt or make it wet and greasey? Will it damage the mechanism inside the wall, the locking and rewinding mechanism??? It drives you nuts on a hot day when you have to see so many customers in different places. HEEEEELP!