I have recently noticed that some of the DVD's I rented are not playing properly on my JVC DVD Player (XV-S500). It is about 20 months old. The strange thing is that those same DVD's play perfectly in my PC-based LG DVD player (it is only 6 months old). Does this indicate a dirty DVD player or does the LG DVD drive just do a better job of reading those slightly scratched DVD's? In all cases the DVD's were not recently released movies but slightly older ones (released 2 or 3 years ago). Thanks.