Sorry for the late entry, but what I would do is call your local housing authority, the Better Business Bureau, and the local health department. Also, in the meantime while you wait for these people to come and inspect the premises, document everything. All the times you have spoken to the landlords, trips to MD and hospital, cost of medications, cost of keeping your poor dog healthy (if you're able, take him to vet to make sure the 2nd hand smoke isn't harming him, and have that report ready for all 3 entities), the cost of all your efforts to clean and sanitize your home and air, etc. Also, look over the lease....does it say you can smoke in the apartments? If so, then they are legally required to have a separate ventilation system for the non-smokers of the building. Just like in a resturant, you are not legally allowed to willfully expose another person to 2nd hand smoke. Chances are that they are not legally allowed to do this, and up until you, no one complained. But what really worries me is that if you are this sensitive to the cigarette smoke, what about your children? Also go to their pediatrician and get a written statement from them on the harmful effects that it is/could be having on them. Also, study up on the laws of your state/county...most people don't know this, but if one tenant is making it unbearable for another, possibly several other tenants, you have a couple options. One, you can make up a petition and have the other residents sign it to have the offending tenant change what is offensive or move. Second, by documenting and taking the legal steps, you can be released from the lease because the landlords have failed to comply to reasonable living quarters (and living with the stench of cigarettes and the harmful effects of 2nd and 3rd hand smoke are not under the scope of healthy living quarters) and in some states/counties they actually will award you a sum of money to help you move from the penalties that are going to be applied to not only the landlord, but also the owner of the building and the property management if there is one. Usually it doesn't get that far:once they see you mean business they either force the offending tenant to stop or leave, have the palc professionally cleaned, or offer to place you somewhere else, like in the other end of the building or even another property, all at their expense. The law IS ON YOUR SIDE WITH THIS BECAUSE IT IS A HEALTH MATTER!!! Don't let that mean lady bully you, and get started right away on the suggestions I gave you, because the faster you act, the quicker you can get back to a healthier lifestyle. Best of luck, and please keep me posted with all your efforts. I will do all I can to help you. FYI, if you're able, print this message I sent you and make copies to give to the landlord, property management, and property owner. Once they see you mean business, it may actually take very little effort on your part to get the desired results :)