I use Stainless Steel bowls, and after their morning meal, I rinse out the bowls with hot water, and then after they eat their evening meal, I put the bowls in the dishwasher and I turn the dishwasher on before going to bed, so they are always clean in the morning.
Food bowl at the end of the night, he gets yogurt a lot, water bowl couple times a week, but I do rinse with hot water after breakfast and after dinner.
Soap and HOT water after every meal, his water dish I use soap and hot water every morning. I'd do the same if we had a kid I spose but I wouldn't make them drink water out of a bowl. I always say it's to bad Buster can't get his own water out of the dispenser.