How to Revive

I have a verbatim cd-rw 8x-10x speed. It’s old for a 1 year. how can I revive it or re format it to function properly?
And one more thing how can i re burn already burned cd-r with something else?

for the cd-rw disc, you will need a burner that supports (at least) the 8-10x speed(rewrite). Most burning software allow for RW disc’s to be reformatted. In Nero 5.5.10.56, go up to the “Recorder” menu and choose “erase rewritable”. It may work, it may not. RW discs are not as stable as write once media (CD-R).

As for your second question, you cannot “re-burn” a burned cd-r disc. CD-R is a write once media.