Now i learn about this after Cd's are almost extinct
Take out your CD/DVD. Examine the back. If you’re anything like me, there is a fair amount of scratches on the back. Some can be fatal - some aren’t. Small ones are nothing serious, but can grind down the quality. If some of it has chipped away, then the CD/DVD can’t be saved.
Get a tube of toothpaste. Yes, toothpaste. Believe it or not, toothpaste has many other applications rather than cleaning one’s mouth. Squirt a circle just on the outside of the inner circle. Use your index finger to spread the toothpaste.
Lay the CD/DVD on a flat surface, and using your “clean” fingers gently rub the toothpaste in small circular motions just as you would if polishing your car.
Leave the toothpaste on about five minutes.
Wash off the toothpaste with cool tap water. Make sure you get all of the toothpaste off.
Dry off the CD/DVD with a paper towel. A paper towel because some clothes aren’t always soft and can cause further damage.
Make sure there is no excess toothpaste left.
There you go you have a minty fresh CD/DVD, good as new.