Seeing a roach after a treatment does not automatically mean the treatment failed. It also does not automatically mean it worked. What tells you more is the trend over time, not the insect you saw the next morning.
What persistent activity usually means
Persistent activity usually means one of several things, and they call for different responses:
- The treatment needs more time. How quickly activity changes depends on the pest, the size of the population and what was used.
- The infestation is larger than it first appeared.
- Pests are active in a connected part of the building that has not been looked at.
- A leak or a structural opening is still there, so the conditions supporting them have not changed.
- Access prevented part of the problem from being inspected or treated.
- The original identification was wrong, so the treatment was aimed at the wrong thing.
What improvement tends to look like
Fewer sightings, then less activity on any monitors that were placed, then no spread into areas that were previously clear.
That trend is what a pest professional is watching for, and you are better positioned to see it than anyone else.
Two things worth not doing
Do not disturb visible bait or treated areas unless the technician's instructions say to. Bait is often placed in specific cracks and corners, and different products and methods call for different handling. Clean everywhere else freely, and if you are unsure whether a spot was treated, ask before cleaning it.
Do not add your own products on top. Ask what was applied first.
What to tell your building
The phrasing changes the outcome. Rather than asking for another spray, ask what has not been found yet:
Still seeing activity around the kitchen sink since the treatment on the 14th. There is an opening around the drain pipe. Could someone check whether that needs sealing, and whether activity is showing up in the connected apartments?
That question gets a diagnosis. “Please send the exterminator again” gets another visit.
If you have reported repeatedly in writing and nothing changes, 311 accepts apartment maintenance complaints.
Pest control in an apartment building requires treatment, repairs, access and information working together. See how the pieces fit.
Send this to your building
If other apartments have the same problem, one message to your super or managing agent does more than ten calls about one unit. Copy this and send it however you already talk to them.
Edit it before you send if you want. No sign-up, nothing collected, and we do not see who you send it to.
Sources
- 28 RCNY Chapter 54 — Indoor Allergen Hazards rules, including the §54-04(a) work practices (PDF)
- NYC Administrative Code §27-2017.8 — Integrated pest management practices
- HPD — Indoor Allergen Hazards (Mold, Mice, Roaches and Rats)
We are a pest control company working in Bronx and Brooklyn apartment buildings, and this is general information rather than advice about your apartment or your lease. Where our sources conflict with each other, we say so on the page rather than picking one quietly.