My Mum says I do it too much. She doesn't clean them very often at all, maybe 4 times a year. I wash them every day. I don't really see why she thinks it's so often for so much effort. I just dump them in the washing up bowl in hot soapy water for 5 mins in the evening then give them a rise after to get all the soap off, leave to try and done.
I know I wouldn't like to eat off the same plate that hadn't been washed!
Is it harder to clean metal bowls then? All ours are plastic.