I've only had my GGTS for a few days but the button has already gone dark - not a complaint, I use this thing like 16 hours a day. I was just curious if there are any nifty (and safe) household items to clean the button and if anyone else has experienced this? Its not a huge deal I have been polishing it with a microfiber cloth (the SS that is) everyday to get my finger prints off it before setting it up for the night or for a short period. I wasn't sure if some of the brass polishing tips I found on the internet would be as safe on a GG such as soaking in salt and white vinegar.