Those low pressure ones you can get off QVC are great for removing caked on grease.
Just don't get caught by the missus like I did, she went banzai at me, mind it was caked in crap by the time I'd finished.
Been caught using the dishwasher before !! and the oven (they make great "spray bake" ovens)
I guess if you chucked in some metal shot you might be able to make a half assed attempt at shotblasting on a moderate spin cycle.
PS don't use the microwave to quickdry home made LED light boards, apparenty the risistors don't like it. Go on, ask me how I know!:roll