Thanks.ClintThey work well for cigarette smoke.

The new neighbors smoke marijuana and cigarettes for hours on end every day causing a hostile living environment.

If it smells like marijuana, cigarettes, etc., well now you need to make a decision if you want to try to get them out now or wait till the end of their lease. 

Spent several days cleaning out the house (hoarding situation), did extensive odor remediation (cigarette smoke), and did some minor cosmetic updates.

they instead ask, "So, how many cigarettes do you smoke a day?" 

Smoking marijuana in the unit and claiming that when reading the lease he thought "smoking" only meant cigarettes.

I then go to the property to check it out and I find tons of damage, drugs, bullet shells, cigarettes, stained carpets, weird smells, etc.

Also be aware that many insurance policies do not protect against "loss of rent" but you can add this coverage.That fire of my landlord friends was a tenant who went outside on the deck to have a cigarette at 1AM.

And the 12 year old standing in the hallway secretly smoking a Winston cigarette quickly ran outside before the Mother could get out the door.

Minuts newest device can detect cigarette smoke as well now