Use the dishwasher at your bloody peril...... Go on then, ask me how I worked that one out..... In the good old days, before H&S , I used to beg/steal or borrow a 25 gallon drum of Genclean or 111Trichloroethane, that stuff really did what it said on the tin, that is if it didn't take the paint off the tin. These days I use a small household stem jet thingy (Aldi special) for small stuff up to and including cylinder heads, or petrol/diesel, and if the wife ain't looking Kerosene 28 from the heating oil tank.....