Just wondering if anyone has any opinions on the key fob covers. Ive seen two different ones on ebay, one rubber type kind that slips over the whole thing and another hard plastic kind that goes only on the front. Has anyone used any one of these? One of my fobs is in really bad shape and the bottom slot where the ring goes broke so i have no way of keeping it together with my keys. Trying to get some reviews on any of the covers to decide whether to buy a cover or just buy a new fob.