Back when I had a window a/c proposal back in the day, I recall it being a real hassle right at the end of summer time when fall was coming around.
You would get all kinds of tree debris and leaves blowing onto the section of the window a/c machine that sat outside the window.
Cleaning it off was actually tough to do, especially if it was on a 2nd floor room. In these cases I had to consistently make the dining room filthy and bring all that tree debris in when I was taking out the window a/c machine to put it away for the winter. I would have to vacuum up all the junk off our dining room floor and then sanitize it as well. It was more or less having to do a deep clean of the dining room after all of this. I am so ecstatic these nights are long gone and today everyone has central heating and a/cs. I do not miss the nights of window cooling systems 1 bit! Having central a/c there is no uninstalling it every single year. It is there all the time and also works as your heater. Though central heating and a/cs are much more overpriced in energy to run than window a/c units or even gas furnaces, I still like central heating and cooling over the way things used to be. Especially when it comes to window a/cs. I am sincerely not a fan of window cooling systems for the exact reason I explained above with the tree debris!