I use two bins for doing dishes(hot soapy and hot clean rinse). Probably get a third, as reading through posts I am liking the idea of the heavy soak to get the chunks off. Anyhow, I use concentrated CAMP SOAP, on acocunt of the biodegradability AND multipurpose nature, but it doesn't really do the trick to break the grease and clean the dishes, and I am left with a film. I have read through a lot of the green posts and noticed some other options, but tell me, what do you use for dish soap that will not hurt when poured around the base of a tree or plant?