After a recent rummage through my magic cabinet i have come across Derren Browns 'Devil Picturebook'
I noticed the dvd cover was all screwed up so it must have been wedged somewhere, When i checked the dvd's to my horror they are scuffed

Does anyone know what the best way to clean them would be? I could provide pictures to show the extent of the damage if needed.
I do not want to test them yet in case i cause more damage
Jim