I just wanted to share my experience with cleaning my stylus using Magic Eraser. I inspected the stylus under a microscope before and after cleaning, and did not see any white residue or debris. Take a look at my before and after shots:
http://imgur.com/F72EWpHI would also like to add that I purchased myDynavector 10x5 cartridge used, and had never looked at my stylus under a microscope before. I assume it was this disgusting the entire time. While I always thought it sounded good, I never thought it sounded great. After polishing up the diamond, I can't even describe how much better it sounds. Tracking is unbelievable, even on the hardest passages, and jazz instruments sound like they are actually in the room with me.
I can't recommend Magic Eraser enough. It changed the game for me. My pictures speak for themselves!