We have a Sony, DVD/CD player with a 5 DVD turntable. It is three years old. Of course it cost more when we bought it than they do now. I noticed last night that it isn't "reading" the DVDs and is registering No Disc. Could it be that it needs cleaning and is there a cleaning disc that can do that? Is it worth having repaired or should I just buy a new one and consider it "disposable". I do not need another DVD player that holds that many discs so I could "downgrade". Any thoughts?