@Andrew178 (not sure if you are tagged correctly), @Lisa723, @Jessica & Henry, you are all assuming that when @Lani20 said the cleaning requirements were not disclosed on the listing, that that was actually the case.
However, how many times have you had a guest not read your house rules (or just read those few bullet points that show BEFORE you have to click 'read all rules')? Had the guest not done this and the host sends the same rules via message as a reminder, the guest then thinks that this is being sprung on them for the first time. I'm not saying that's what happened with @Lani20, but it is a possibility.
Then again, perhaps the host didn't mention tasks to do before checking out, assuming that what he/she required was the 'norm'. As we can see here, there is no norm. I don't usually discuss check out with my guests until the end of their stay, but then I don't expect them to do much, just leave the key.
I do, however, expect them to be reasonably tidy during their stay as it is a shared space, i.e. do their own dishes (put them in the dishwasher - they don't even have to turn it on), clean up any spills and dispose of any food waste/packaging, or other waste (if they have a large amount) in the bins in the kitchen. It's not a big ask, especially as I don't charge a cleaning fee. Not all guests do all of this, but I would say dishes are a must. I think it's pretty direspectful to leave dirty dishes lying around or to leave rubbish on the floors or furniture. I even had a recent guest leave chewing gum stuck to the floor.
Also, @Lani20 there is no point comparing an Airbnb to a hotel, unless the cleaning fee means you are paying the same amount. Most airbnbs are significantly cheaper than a hotel and so you cannot expect hotel-style housekeeping, which you are paying the hotel for in your room rate.
Not only are my listings way cheaper than hotel prices in London, but guests save a considerable amount by being able to use a kitchen. In order to keep my prices that low, I need guests to not create hours of extra cleaning for me by leaving their dishes and rubbish strewn around. I'm not saying that's what you do, but plenty of guests do do that, so I can sympathise with hosts who charge a cleaning fee.