Dig up some change from the living room couch and go buy a fresh one. There's no use in fixing the one you've got unless you paid some serious cash for it, it's just too much of a hassle IMO.
Combinations of dirt, dust, and food crumbs (in your case) are the reason for this, I would assume. The first two buildup naturally. The food part is your fault. Haha.
Combinations of dirt, dust, and food crumbs (in your case) are the reason for this, I would assume. The first two buildup naturally. The food part is your fault. Haha.