Ever since I purchased and installed the Bust the Dust Kit, it has been driving me crazy for one reason or another. EA/Maxis fixed several of those problems with previous patches, but this particular annoyance is not one they intend to fix. What annoyance do I speak of? Every time a Sim enters a clean or semi-clean room they sniff and waft the air, which is an animation that takes up too much time, if you ask me. So, I sifted through tons of code and finally figured out how to disable this animation without disabling the beneficial buffs you get from being in a clean or semi-clean room.