I need some input from all of you. My dd, the one who just had the baby, is going to be coming up to visit us at the end of the month. My dh (very dumb of him) still smokes and the only place he smokes is in our bedroom (he is hooked up to his dialysis machine for 9 to 10 hours at a time). I need to buy a air cleaner that will clean the smoke out of the air. Does anyone have any experience with air cleaners?