But what if they serve onions and you use your fork and knife that were in the dishwasher?
Hmmm.
even if you you use a knife on onion, the taam wont come out of the knife, but there is no treif taam in the knife, cuz where did it come from? – not he dishwasher which is more than a ben yomo. you could have a real problem if you cooked treif in the dishwasher and then used it to cut the onion