I'd give some tips but there's really nothing anyone can do. You could call Sony and maybe they'll repair it, but for a fee of $149. Only thing I can recommend is to keep doing what you're doing. Save up more money a buy a Slim (X-mas is around the cornr so save up them gift cards and them 20s from grandma). They're cheaper and [I'm assuming] lighter. Also, when you do get one, you can link your old PSN account with the new one so you don't have to pay for your DLC again.
Oh, and I'd also find a better place to put it. Preferably someplace close to the ground and out of the way.