The house definitely needs a deep clean. The smell of cat lingers for the duration of the trip. I informed the host of the cat’s litter scent and he addressed with the air freshener. Though it did not fully solve the problem, it did help. My parent and sister felt extremely congested after every night. They had to get claritin to deal with the allergy from the cat’s dander. For the price it was worth it but if you have allergy to cats then I would think twice.