For the cleaning, I’d say “this was already cleaned multiple times. However if you want to find a housekeeper to clean it to your standard you are welcome to to do this…” And see what they have to say. If they insist, you can compromise and say “as good will o will give you $100 towards your cleaner”….
Also far as the pressure washer, I would say the exterior appearance is as is. Pressure washer is not permitted as it can cause damage to the surfaces.
