Frequently Asked Questions: General Pest Control by Spraying

Residual spraying for general pest control is one of the most common treatments that every household, commercial, and even industrial property avails from pest control companies like us. Although this service is highly effective in controlling the four prominent pests in properties (flies, ants, cockroaches, and mosquitoes), clients must also understand that one treatment doesn't always result in complete eradication of the infestation, especially in cases of heavy infestation.  

Clients must understand that to completely eliminate an infestation, they must follow our recommended integrated pest management program, which provides guidelines to clients on what they need to do on their part to make the pest control service effective. This usually involves improving sanitation practices and sealing possible pest entry points.

 So in this article, we aim to help clients understand how this works by answering the most common questions about general pest control by spraying:

Why are there even more cockroaches after the treatment?

Some properties may experience increased cockroach sightings or activity right after the service, but there's no need to be alarmed. This indicates that the treatment is working, and the sudden change in pest behavior means they are now confused and irritated. They may be seen crawling out of their nests, but it's because they are slowly dying and unaware that they are already out in the open.

Why am I still seeing cockroaches after the treatment?

    Although it generally takes up to 14 days to see the full effect of the treatment, there are several reasons why you may continue to see pests on your property:

    • The property may have openings or gaps serving as pest entry points, allowing outside pests to freely enter. Although they will eventually be affected by the treatment, it may take some time before they reach it. Hence, sightings may persist after the service, but it does not mean the treatment is ineffective.
    • Nocturnal insects like cockroaches are likely to hide in their nests during the treatment (day time) and will only be affected when they come out at night and have passed by the treated areas. This also explains why you might still see cockroach activity a few days after the service.
    • Cockroach eggs that hatch after the treatment will only be affected after they are exposed to the treated area.
    • If the property was not prepared for the treatment as outlined in the prep sheet, the technician can still treat the property, but they'll have fewer areas to treat. Consequently, it will also result in a longer time needed before the pests is affected by the treatment.
    • We may have rotated the chemical used in your property. Different types of pest control solutions have varying effects on pests. For example, an instant-kill solution terminates pests immediately but has a low residual effect (little to no effect after it dries up), while a slow-kill solution gradually kills pests with a residual effect lasting up to 90 days for residential properties and 7 to 30 days for commercial ones.
      • It is important to note that chemical rotation is crucial for an effective pest control service. We are required to rotate the chemicals used in each service to prevent the pests from building up immunity from the chemical.
    • If the property has a heavy infestation of pests, follow-up treatment as well as addressing areas of concern as stated in our service report is required to completely eradicate the infestation.
    • Having the property cleaned right after the service washes off the residual effect of the treatment. Therefore if the property is scheduled for cleaning, we recommend it be done before or at least 2 to 3 days after the residual spraying service. 

    Why am I not seeing dead cockroaches in the treated areas after the treatment?

    It may take 7 to 14 days before you start noticing the effects of the treatment on your property, so it's normal not to see dead pests immediately after the service. One reason for this delay is that some pests have developed a tolerance to pesticides, and it takes time for the treatment to have an impact on them. However, the advantage of this delayed effect is that it allows the pests to contaminate others hiding in their nests undetected.

    What if I am unable to fix the issues stated in the report?

    Although pest control using chemicals is an effective way to decimate pests inside a property, eliminating the source is crucial to stop the infestation and/or prevent a re-infestation. 

    Do not hesitate to ask our office or technician for alternatives to fix an issue if the first suggestion is not possible.

    If I address all issues mentioned in the report, will you guarantee 100% pest elimination?

    Addressing all issues mentioned in the report will lower or even end the pest infestation on your property. However, please keep in mind that there are many possible reasons why an infestation starts again in an area, including:

    • Pests that come in with your deliveries (furnitures, old boxes, etc)
    • Pests that enter from a new entry point (windows without screens, door gaps, etc)
    • Pests brought in by guests (accidentally through their bags) or pets

    This is also one of the reasons why follow-up treatments are always recommended to not only prevent a re-infestation but also detect early if there is an area of concern that needs to be addressed. 

    Can you do all the repairs needed on my property?

    Yes, our office can send a proposal with all the needed repairs and send you our costing for your approval. 

    If you have any questions not addressed in this list, please feel free to contact us. We're here to help. You can reach us at 0917 517 8222 via text, call, or Viber, or email us at

    About Triple A Pest Terminator Inc.

    Triple A Pest Terminator Inc is an accredited pest control operator in Quezon City, Marikina, Makati and the rest of Metro Manila. We offer all types of pest control and prevention service for all types of pest.


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