I have 2 questions:
1. Is this gel something that has to be done once a month or every week, what the time frame for treatment again?
2. How to remove gel that is left on the wood surfaces for treatment and how long to leave gel?
The general rule when using roach gel is you should retreat as needed. Obviously this is “vague” to say the least. But here are some guidelines that should guide you along the procedure.
1) Make initial placements where you’ve seen active roaches. And keep track of every placement. Try to make these placements small. As explained in our ROACH CONTROL ARTICLE, gel placements should be small and discreet. The more you make the better. Many small placements, about the size of a grain of rice and spread out over a small area, will prove to be a lot more effective compared to one large placement. So for the initial treatment, make 5, 10, 20 or some other “round” amount of dabs where you’ve been seeing roaches. And keep these dabs close together, maybe one every foot or two, so you can look them over anytime to monitor acceptance. By making a number of placements like 5, 10 or 20 in one area it will be easier to monitor them when checking.
2) The next time you treat will depend on what you find following your initial treatments. For starters, if you find any roaches active where you treated, there is no need to do anything but let them be. In other words, let them feed and don’t kill any you see feeding! Contaminated roaches will effectively kill other roaches so let the product work it’s way into the nest. People will many times kill feeding roaches thinking they’re helping but actually you are delaying the process. Let them feed!
3) If you see roaches in areas where you DID NOT apply gel initially, be sure to add gel immediately. It’s not uncommon to miss a few locations with your initial treatment and it’s important all known active locations have roach gel available for the foraging population.
4) Inspect your placements daily to monitor how much is being consumed. I’ve seen where all the placements have been eaten in one day. I’ve also seen where only a small amount is eaten over a 2 week period and then no roaches are ever seen again. If you note fast acceptance and some of the “dabs” disappearing after a day or two, renew them once they’re gone. One thing about bait is that once it’s all eaten, you won’t have any left working for you so it’s important to keep a steady supply available. In bad cases where the roach infestation is high, they can eat quite a bit. In other words it can sometimes be necessary to rebait every 2-3 days for a few weeks in order to “feed” all the inhabitants.
5) Since adult roaches will feed right away, most all should feed and be dead within 7-14 days of your initial placement. In general, if you’re still seeing live activity after 14 days and what you’re seeing are adults, bait these areas again. You’ll do this because the fact that you’re seeing live adults means some still haven’t ingested or come in contact with the gel yet. Most of the time you won’t see any activity after 2 weeks but that doesn’t mean you’re done. As our article explains, roach eggs will hatch young baby roaches which won’t feed till they grow a bit. For this reason it’s important to keep the gel active for at least 2 months; preferably longer. So if you’re not seeing any activity after 2 weeks following your initial treatment, let it go a total of 4 weeks from the initial treatment and then retreat. This insures you’ll have fresh gel for the babies as they develop and start to feed like adults. Follow this pattern for at least two months but 3-4 months would be better to make sure you get them all since roach eggs can lay dormant for long periods of time. And in general, the gel will remain fresh for at least 2 weeks but usually up to 4 weeks. Once it’s a month old it tends to get too dry to quickly accepted so renew placements to make sure this doesn’t happen.
I believe number “5)” answered your question as to “how long to leave gel” out. As for clean up; all it takes is a damp paper towel or napkin to wipe up any gel misapplied or if you need to remove some after you’re sure the roaches are gone. Nothing fancy cleaning wise is needed; you only have to wipe it off but you can employ any standard cleaner if desired. But as our article explains, there is no need to make placements “out in the open” so really there should be little cleanup needed when treatments are done properly. Since roaches will easily find roach gel, making discreet placements where it’s hard to see any gel at all will work so there is no need for it to be out in the open. Placements can be on the bottom side of a cabinet, shelf or drawer. Gel works fine inside a cabinet, the back side of a door or behind an appliance. And as explained above, gel placements should be small so even if you were to have a direct “line of sight” to where you dabbed some, it would tough to see when the right amount has been applied.
Hope this helps answer your questions! Here are direct links to the information and products listed above:
Roach Control with Gel: http://www.germanroaches.com/roach-control#roach_spray