We usually camp, so I have only occasional experience of self-catering.
The first time we went, I was completely shocked at the amount of cleaning demanded of us before we left. I couldn't understand why we were paying a small fortune and expected, effectively to clean the house completely.
I expected to clean and pack away cutlery, crockery, kitchen equipment etc. I honestly did not expect to have to mop and clean down.
I realise now, that it is expected because a lot of self-catering accommodation is on a tight turn-around and the cleaners don't actually have time to clean, just to make the beds and do a basic check.
That first time, a number of our party had to leave the night before. We had to be up to leave at 5am, so we got up at 3.30am to clean everything down as instructed. I was honestly tempted to forgo the deposit!
Last time we went, we actually decided to go to a B&B to extend our holiday, so we could completely clean the holiday house and not rush!
I know that those of you who are used to this will think I am unreasonable!
We continue to camp mostly!