Some do , some don't to be honest. Heck I've even had good luck with rubbing a white Toothpaste on cd's and Buffing them with a Soft cloth to get them to work. Most kits have a Gelatinous Silicone micro Beads type thing, and If you get a good one, they will work. Shoot one of the best i ever had, I picked up at walmart for about 20 bucks.
Hope this helps Bro.
Stephen