Minimum four times a day since Bagel arrived. I feed raw. I also have a few extra dishes so I can just swap them out easily but... I don't have enough.
For dry food, I'll pop them in the dishwasher whenever I run it. I live alone, so that's usually every 5-7 days. Wet food dish gets washed after every use.
I only give dry food to all the cats I've had. The food bowls get washed and after dried with paper towels every time I fill their plates. What's left I pour onto a paper towel and then pour it on top. Water bowls get washed very refilled every morning. Their plates are on a kitty table mat side by side. I don't put the plates into the dishwasher as I only run it once a week.
If don't have hit water in the summer you could always, for their plates, boil some water and mix it with cold. I usually only use cold. By the time the water warms up I've done them already.
Wet food bowls are washed daily as are their waster bowls unless I am interstate for the weekend (My work has me traveling frequently)
If I am going away hey have an extra bowl of wet and an extra bowl of dry left out and 3 waters. If I am away for more than 2 full days I get my neighbor to check in on them and wash their bowls and give them more fresh food.
My vet has advised me to always keep dry food available. My kitties get a bowl of dry food that never runs out - It's kept full and will be washed once-twice a week.
LOL! I just took a picture of the cat dishes I have waiting to be sterilized and put into the dishwasher - this is a daily chore for me - and I wonder why I'm tired.
if it is only kibbles we leave that out for a week or so if it is soft food mixed we claen each time the food is offered be it 2 times a day which is normal or these days every 1 1/2 hr as we are coaxing her to eat
we also use very hot water to wash them and nothing else they are procelain bowls
I find my bowls at thrift stores too. I use fruit nappies, which aren't as popular as they used be, I guess we humans aren't eating enough fruit desserts. With 7 cats to feed we go through a lot of bowls a day, at least 14, and my dishwasher is filled with them more than anything else. I prefer the porcelain/china bowls that were part of a set of someone's dishes to the clear glass little bowls as I can see them on the floor better. Water bowls are from the the thrift store too but are bigger casserole dishes or are ceramic mix master bowls for the dog. And, why does the dog think the water in the cats' bowls is better than the water in his big bowl? LOL.