Mayo is made with vinegar, it might (over time) eat away at the CD because the data tracks are made of some kind of fungus or something. And submerging a cd in room-temperature water is ok. Too cold or warm is bad though, but I've completely submerged CD's before to clean them.
I think that's if you use hot water. Or if you leave it in direct sunlight for too long. [/b][/quote] I know someone who had a CD that didn't work and just ran it under water and dried it off with a paper towel and it worked well. But try this at your own risk if you want... :wth: