I am mad at my Philips CDD4801

I made a ton of coasters with this burner and my CDRWs dont want to work.
Curently I use memorex and i have burned succesfully before but now it wont burn, saying that the discs are damaged, but i can sucessfully burn those discs at my friend's house. Now recently It hates my TDK brand and doesnt want to properly read discs, I know i might have abused it because ive burned like 250 discs but i know burners can go MORE than that... any suggestions because Im setting my eyes on a SonYDRU500a...
By the way this burner came with this cheapo Compaq on a WINME (the best OS) ((jk ))