I can attest to the toothpaste actually working. I actually found it worked better then similar paste like products actually sold at stores for the purpose of repairing disks.
I believe that @BlackKrystel told @blizzb3ar to "Get Good" at fogging up a disc. :D haha love it. And no licking discs for me either. Didn't know the toothpaste one. TIL.