I’ve always used Dawn and a scrub brush… Cutting trees that are on fire wearing hydrocarbon and sawdust covered chaps is no bueno. The FR part of the chaps may not catch fire, but the oil in them will. So I keep mine fairly clean and I definitely make sure I don’t get mixed gas on them.
We have an extractor at the fire station, that I have never thought about using. Until this thread. It will probably do a better job of getting them clean, too.
Thank you, Philbert.