Take a look at your disc and make sure there is not much dirt or fingerprints, which can easily cause discs to skip. Wipe the CD or DVD with your soft towel from the center to the outer edge.
If the scratches are so difficult, try using car wax or toothpaste to begin with. Take a small amount and rub it into the scratched area with your soft towel and let it dry for a few minutes.
Wax or toothpaste should act as a sealant, filling scratches – which is to prevent that part of the disc from being read properly by the laser. If this does not work, try buying a CD repair fluid and use it the same way you did the wax or toothpaste.
For deeper scratches, you may want to try a motorized repair kit, which can really grind out some of the scratches. I have used all of these methods before and they work as long as the disc is not so damaged.
Tips and warnings
Nothing is more frustrating than when you can not get your favorites to play CD or DVD correctly. What most people do not know is that most minor scratches can be repaired quite easily.