Originally Posted by moxfyre
I use Simple Green. Good for cleaning chains and other moving parts, good for getting dirt off frames. Non-toxic, cheap, effective, smells good. Works at least as well as the expensive high-zoot Pedro's Citrus Bike Degreaser.
+1. Simple Green is very available and effective. And it's water soluble, so it can be disposed of in a sanitary sewer system. Also, I've used some citrus (orange) based cleaners with equal success and they smell much better than Simple Green.