I bought a little portable steam cleaning machine (As seen on TV type) off of eBay the other day and it works great for cleaning various stuff in the engine compartment, wheels, etc.... Just thought I would pass along the tip. Do a search under "steam buggy" on eBay and you will find the unit that I bought. One company is selling slightly used, customer returns for really cheap. I got mine for $25! I think the regular retail is over $100.