I have a window fan and set it to blow out. Cleaning the shavings once a week seems fine, unless they have a lot of babies in the bin. Those get changed more often.
I will be looking for that Arm and Hammer spray. Can always use something on those days, you know. I'm thinking of hanging some air freshner type things on the fan itself so it blows out less odorous air. But I don't have a neighbor within 3 lots of me, so it's not an issue. I'm sure if my window was next to my neighbor's house, I'd have a few complaints at times!
Seems the best results come from just CLEAN CLEAN CLEAN CLEAN. I KNEW I would end up spending way too much time taking care of rats for the money i'll be saving by raising my own rather than buying feeders. Oh well.