I plan on getting some of these too. To clean them, I plan to use warm distilled water, a small water tight plastic bottle, and very light food grade citric acid powder in my vibratory tumbler. Citric acid is one the ingredients in a lot of beverages, specifically colas and juices and is a natural cleaning agent. Read the ingredients on a packet of non sweetened Kool-Aid mix, it's just citric acid & flavoring. Put the dirty cart in the bottle with the solution and shake it up for a few minutes. It also passivates (protects) metal surfaces against corrosion and can clean burnt substances off.