I put the disc in and it still says "Insert Disc". Yesterday I re-inserted it and then it worked. Today, no such luck, no matter how many times I re-insert it. So, is there a cheap cleaner kit or something that will fix this? Or is this one of those things where I have to weigh paying like $150 to get it repaired or $300 for a new player? It's about two years old, btw. Advice?