I put in a dehumidifier and an air purifier.

She also owns air purifiers, smoke buddies (a device that eliminates odors and smoke) and an elite carpet cleaner so that the smell is not noticable. 

-Scrub walls with TSP (tri-sodium-phosphate)-Paint using Kilz primer specific for nicotine-Have an air purifier on the entire time-Then paint overSince time is not on your side, maybe just do the air purifier and maybe scrubbing and hope for the best.

Housing services or bullets and water purifiers - it depends on your view of the future.

It’s also very hot here and the house is closed up... so we are going to get fresh air in, run air purifiers, use different cleaning solutions...

I have also been looking into air-purifiers to help with this problem. 

I have a built in water purifier and a Brita Water Filter, so I don't provide bottled water.

I received a text mid-April that indicated they had the air tested because she found out she was pregnant and had been having issues so they bought several air purifiers to help until the lease is up..

Enerzen Commercial Ozone Generator 6,000mg Industrial O3 Air Purifier Deodorizer Sterilizer (6,000mg - Black) https://www.amazon.com/dp/B00JAP7388/ref=cm_sw_r_cp_api_i_vUjgEbV4Y0JHDI find they work great.

That is why I pass on the non motivated sellers and exchange them for motivated selelrs to purify these 100 spaces I have with as many motivated seller leads as possible.