Linda, you are absolutely right, I fallow your suggestion and blocked three month for the same reason as you mentioned.
i get very tired to clean precisely before and after and I like to have a break from this .
i have some relative who like to stay for three month , it's less money, but less hard work.
i blocked my calendar about 10 days ago and found today that my blocked days are unblocked!
For sure I saved those days, but they misteriously. get unblocked and I blocked them again
the Airbnb continuing to press me to switch to instant booking again, and lowering the price, so far I refused, because it's not make any sense to me