I have a SAMSUNG DVD/VCR player that is about 5 years old but probably hasnt been played more than 5 hours total. The VCR seems to work well with no problems. However, I noticed quite a while ago that when I put in a DVD that, after a short while (usually several minutes) it begins to "freeze" in place, sometimes starting on its own and othertimes needs a little "coaxing" (fast-forwarding) from me. Any ideas as to what the problem is and is there anything I can do to resolve this issue? If it just needs cleaned, is there any one product that comes highly recommneded? Thank you