AIBU - putting dishclothes into the dishwasher

Urgh - I went to unload the dishwasher this morning (my husband had loaded it and set it going last night) to find that he'd put three dishclothes in with the dishes, to wash them.

He did this once before, years and years ago, because "Kim and Aggie did it". I told him in no uncertain terms that I didn't give a toot what Kim and Aggie do/did, but in my house that was NEVER to happen again. And - to my knowedge, but now I'm not so sure - he never did it again.

So - AIBU to not want dirty dishcloths put in with the plates/cups/glasses etc in the dishwasher.

His argument is that it gets so hot in the dishwasher that any germs on the clothes are killed off, and it's actually a hygienic way to clean the cloths.

(I have taken the cloths out and re-run the dishwasher.)