TCAS wrote:without damaging it?.
The label or the disc?
Seriously, the first thing to do is make a backup copy
before messing around with your data. And next time, don't put labels on DVD's.
The c't article on labels
had a couple of remarks about removing labels from DVD's (forget about CD's- you'll remove the information layer).
- don't use a hair drier (thermal tension builds up)
- don't soak for hours in dish detergent (polycarbonate substrate takes up a lot of water- up to 3%)
- suggested "orange cleaner" (whatever that is) or a label remover (local brand: UHU).