I cleaned a 20 bed residential care home for dementia patients. Place was minging. First clean took ages but thought ok as second clean would be a lot quicker. Quoted 6 to 8 weekly they said they would prefer 8 to 10 weeks. I went along with it and when I rang to make second appointment they said they would call when they needed doing again. I will probably decline politely as they will be back minging again.