To use Advion, first decide whether you need to use it indoors or outdoors. Heavy infestations will require both, but if you have only seen a small number of cockroaches, you can stick with using the bait inside only. Apply Advion wherever you have seen cockroaches, and pay special attention to any crack and crevice nearby. Follow the manufacturer’s instructions and start with one to three drops of product for small infestations or three to five for larger infestations. After you have placed the product, monitor the area for the next few days. You’ll probably see more roaches at first while they’re attracted to the bait. It might seem like the problem is getting worse, but have patience. Additionally, do not kill the roaches you see so that they can ingest the bait and transfer it to other roaches as well.
Unfortunately, you may see both the influx of roaches eating the bait as well as all the roaches that start have started to die. Be sure to clean up the dead roaches as you see them. If you leave the bodies around your home, it could attract even more pest problems like ants and flies.
If it has been a few days and it seems as though the roach gel has been ineffective, check the gel expiration. If you have had it for a while, it may be expired and not working as effectively. Some users also reported that their brand new gels expired much quicker than expected. If you feel you received an already expired product, you should contact Syngenta for more information.
Be aware that cockroaches can occasionally build up a tolerance to the gel. So, if you find that the gel is less effective than before, try switching to a different gel bait for the time being. Afterward, you can switch back to Advion before the roaches get used to the other product.