I thought I smelled dust last night! And what do I wake up to this morning, a nice layer of dust all over everything. I have a 9 month old baby here, I really hate her breathing in this stuff. What can you do to minimalize it? Are you supposed to keep the a/c's off or on? I have a split unit, brand new hitachi. I suppose it also doesn't help that there's a gap under the kitchen and patio door for the dust to just sweep right on in...