I have these merlin (bbc) dvds and i put the box on top of my lamp and then, when i picked the box up it was really hot. All of the dvds were boiling and then i tried playing one of the dvds (the hottest one) then it was fine,, but when i got further into the episode it started to jerk and jump. These arent mine i was borrowing them so i was getting worried. I took it out and gave it a wipe and tried it again, but it kept jerking. My friend keeps her dvds in good condition so there were no scratch at all. I probably have permanatley damaged them so i want to know if there is anything i can do to stop them from jerking ... thanks for the help