10 items you absolutely should NEVER wash in the dishwasher On 19 October 202219 October 2022By Good News Share 8) Cast iron Cast iron is a very porous material. Because of this property it can absorb and retain chemicals that arefound in dishwashing detergents. For this reason, it’s better to wash it only with lukewarm water, removing food residues with a scraper. Pages: 1 2 3 4 5 6 7 8 9 10 11