FWIW. Some people LOVE to use degreasers ... I'm not one of them. I recommend that you always start with the mildest solvent -- in other words, plain WATER ... If that doesn't remove the dirt, then use the "Palmolive" dishwashing detergent dissovled in some water ... If THAT doesn't work, make it a little stronger solution. Transition to WINDEX-or-simlar spray cleaner, next ... FORMULA 409 if you feel like dissolving unprotected decals, etc ... Mineral Spirits. next ... Degreaser or kerosene as a [COLOR=FF00AA]last resort[/COLOR], IMO.