The room I was placed in smelled heavily of cigarette; even though, it is a non-smoking house. After about 15 minutes in the room I became nauseous from the smell, as it was stuck to the walls of the room. No amount of airing it out was going to do it any justice.
I left after an hour and booked another stay in Cambridge. I was offered a 2/3 discount on the stay, which I declined as the room was in no condition to stay in. I wanted a full refund.
After contacting AirBnB for the full refund, the Host accepted the claim and I was fully reimbursed.