About 3 months ago I bought an RCA 5 disc 160W shelf system at my local Kmart. Everything seemed good at first and it had (and still does have) excellent sound, but then I noticed that some of my CDs, both factory produced CDs as well as CDRs have trouble playing. For some, it takes a long time for the player to read the disc and then play it. Sometimes it will read the disc but not play it, and sometimes it will not even read it. I'm very frustrated by it and its now too late to return the darn thing. What can I do about this. Any answer would be helpful, thanks.