I recently was away from my house for an extended period of time (10 days) due to a family emergency. I got home to a really musty and litter boxy smell (I have two cats).
The cats stayed at home during this time (long story), but they had visitors just about every other day. But the litter box didn't get cleaned so it was full. I plan to buy new litter boxes because they were nasty. I am also going to deep clean their litter area. Hopefully that will take away most of the smell.
But their litter area is far from the living area. And it really smells like musty-litter in the living room...like the odors migrated into this area and are now stuck. Any ideas how to freshen it up? Open windows? We have all wood flooring exempt for the bedrooms and the cats do not have access to that area. Maybe scrub/mop the floors?