If you have been using Riteks, KEEP using them....
They are not the problem..
Try cleaning the laser FIRST....
Go to your local electronics store and ask them for a cleaning disc..
Try to get the ones that have the little brushes on it... (When you see one, you will know what I mean)
It is probably not from overuse...
I have a V7 & V5.. (V7 has Messiah 2.. V5 has original Messiah) They have both been ABUSED as far as playing them a ton.....And they have both seen Ritek dvds forever....
I clean them both once a week with a cleaning discs, and they will play any disc I throw at them....
Most laser problems in "newer" PS2's are because they have not been properly maintained and cleaned...
Give the cleaning a try.. You may be happily surprised.