Sooooooo....What do we clean our bikes with? Is Simple Green a Citrus based cleaner? I don't think so, I'll have to go look at my bottle of Simple Green. Citrus cleansers are made by Pedros and a few others...I don't think there would be a market for them if they were bad for bikes. WD-40 wouldn't work because if there was any trace left it would eat the lube away.....Hmmm, I wonder what we are going to do?