Take your number of rooms and divide it in half. Spend 10 minutes in each of half of the rooms one day, then 10 minutes on the other half the next day. If you have six rooms, that’s only a half hour a day, but it needs to be every day. Spread them out if you can. Once you get on a good cycle of that, after a few weeks, you’ll probably be able to drop to one 20/10 a day. The key is to get to every room no less than every other day, even if it’s only for five or ten minutes. You’d be surprised how far five or ten minutes goes.