Or hire Servepro...Treat chemically for mold as well.

You will need to use a carpet cleaner that cleans with chemicals and hot water not just steam.  

What you don't want to end up with are the last-resort college students as they'll usually be harsher on your unit, collecting rent will be troublesome, etc.  

Typically, I have the termite company do any chemical treatments and I have my guys repair any framing, etc as I can do it cheaper than their bids.

Unfortunately, the brass Kitec fittings allowed a chemical reaction to take place which eventually weakened the fittings causing them to fail.

The 400 sq ft house had an estimated 25,000 cockroaches and they spread quickly and took months to get rid of.I had to pay for the neigbors cockroach bills because when the chemical was applied the cockroaches started invading the neighbors homes.

The chemicals were $400, and I essentially dug a 12 inch ditch all the way around the perimeter and dumped them in.

Try Chemical Bank @Ellen Morrison.

Tenant acknowledges the premises are designated as smoke-free and agrees not to smoke and will not allow any of their family or guests to smoke on the premises, either inside the unit or outside on adjoining grounds.Tenant agrees to abide by this no-smoking policy.This includes smoking tobacco, marijuana, any other substance and/or vaping chemicals.

I have worked as a Chemical Processor for the past 7 years.