Pour gas on floor of garage, add Tide, scrub and hose off and wash down the street!!!
Comes clean every time!!!
Bring back the smog of the 40s and 50s in los Angeles and maybe all the complaining easterners will go back to where the came from!!!
Close to what I do, but in the country after we scrub and hose off I send a match in a graceful arc and let it burn off while it’s running down the driveway.
“Pour gas on floor of garage, add Tide, scrub and hose off and wash down the street!!!”
Unfortunately a kid in a small town I lived in did that one winter night at a service garage with a kerosene heater burning.