The situation

Illustrative example. Not a real job or customer.

A landlord of a hypothetical older two-bedroom apartment in a Denver-area brick building gets the keys back after a tenant of several years moves out. The unit passes a quick visual check, with no heavy yellowing, but smells strongly of cannabis when the door opens, especially in the larger bedroom and the living room. The heat is on, and the smell gets stronger as the radiators and the forced-air register warm up.

  1. The landlord first documents each room with photos and short notes, using a consistent odor scale.
  2. A white cloth wiped across the bedroom window and ceiling shows a tacky film, which suggests surface residue.
  3. Carpet in the larger bedroom smells strongest. Lifting a corner shows a pad that smells much stronger than the carpet surface.
  4. The landlord replaces the furnace filter, which was discolored, and washes the hard surfaces from ceiling to floor.
  5. A short retest after two days with the heat running shows the living room is much improved but the bedroom still smells.

In this made-up example, the landlord decides the bedroom carpet and pad should be replaced instead of cleaned a second time. After replacement and a final wash of the closet, a retest on a warm afternoon finds only a faint smell near the window, which is addressed by laundering the curtains. The point is the sequence: record, find the source, clean, replace what cannot be cleaned and retest.

What this example illustrates

The landlord did not start with a spray, a fog or a coat of paint. The tacky wipe test showed that surface residue was present, so hard-surface cleaning made sense. The pad test showed that part of the odor was stored deeper, which is why a second carpet cleaning would likely have disappointed.

A real situation would have its own surprises. The building could have shared ducts, older plaster that holds smell differently or a lease with specific language about smoking. Anyone in a similar position should read their own documents, check with their local housing and deposit rules, and verify what is true in their own building rather than adapting the example blindly.

The example also shows why a neutral record helps. Dated photos and room-by-room notes made it easier to discuss the condition with the former tenant and to decide which costs were linked to residue versus normal wear, if that question arose. For that, the record is a tool; it is not a legal conclusion.

Steps a reader could borrow from this example

  • Record every room before cleaning, with photos and a simple odor scale.
  • Do a wipe test on glass and ceilings to find surface film.
  • Lift a carpet corner and compare the pad with the surface.
  • Change filters and check returns, then retest with the system running.
  • Decide on replacement only after a cleaning attempt or a clear test result.

Common questions

Is this a real job?
No. It is a hypothetical example written to explain a pattern.

General information for the Denver area, not a quote or professional advice. In an emergency, call 911.