@Sam397
I have never charged a separate cleaning fee. But I only have a private room/private bath to clean, and do it myself. It takes me about an hour and a half and maybe another half hour to make sure the kitchen and other space I share with guests is clean and tidy.
But I also have a 3 day minimum and most of my guests stay an average of a week to ten days. So spread out over the length of the booking, the cleaning time averages to about a half hour per day max, and most times less.
I mostly get clean and tidy guests who don't leave a huge mess to clean up.
I have been closed to bookings for over a year due to Covid and sharing space with guests, but plan to open back up in the fall, when my normal tourist season starts. I basically always cleaned to Covid standards, sterilizing all surfaces guests touch, and I live in a climate that allows for windows to be always open, so I don't foresee the cleaning or protocol taking any longer.
That's what has worked for me, I guess you have to look at the average length bookings you get, the time it takes to clean, how your local competition is charging, etc.