No always rinse plates prior to putting in dishwasher. Didn't have to be hot tap, cold would do. But he was looking to see which was marked hot. Like I say taps are same as always. Been a few similar things recently, I've commented every time with things like "Are you for real?" It's not the unusual, it's the things which should be automatic. Think I might have to keep an eye on him. No he hasn't been taking the Mick. He genuinely said he couldn't remember which was which.