Was in asda earlier so got 6 bottles of 17p Rola cola. If that doesn't work then the over cleaner is coming out for a sparkly new engine. Pretty sure I would be kicked out if the head made its way into the dishwasher though
Here's your answer:http://www.gumtree.com/p/for-sale/working-hoover-dishwasher/1050828264One use and straight to the tip. Or just leave it in the back garden for further cleaning, especially at that price!
My dishwasher has had 4 alloys, 2 rocker covers and a sump in it so far!