The Dry Cleaner

I seldom have my clothes dry cleaned because nothing I own requires it, and frankly I don't know what dry cleaning entails. Do they wash it? Maybe just blast it with compressed air? I'm not sure. But about a year ago I got a new knit jacket and the same day bumped into a lit candle while wearing it. I did not turn into a human torch, but I did walk away covered in melted wax. Then the other day, I had an epiphany: dry cleaning. I still don't know what voodoo they do in that Laundromat, but I know that I now have an (effectively) new jacket.