Feb 14, 2013 - 01:40 PM
Boric Acid dust will last a really long time, usually up to a year or more if dry and it does not get wet.
If the dust is unsightly, then I would recommend to sweep it up and brush it into cracks, crevices, etc. Usually, you do not want to see the dust. It is great for application into cracks along baseboards, cabinets, inside walls around plumbing and electrical lines, and other places where cockroaches hide.
In order to apply it correctly, you need the duster that comes with the kit or any of our hand dusters. This way it can be "puffed" into cracks, etc. The correct application is a really thin layer, similar to dust that you would find on top of the TV. Anything any heavier, and the cockroaches will walk around it. So basically, you want really thin layers of dust and not anything thicker than household dust. "Puffing" it will give you the correct amount.
Another tip, if you can see the dust, then it may be too heavy of an application.
If the problem is solved, then clean up all of the dust you can find or brush or sweep it into cracks, etc. This usually is a 1 time per year or less application. Reapplication is not needed unless the roaches reappear and then, you should concentrate on treating areas that you missed the first time, and not to reapply the dust into the same areas.
Hope this helps.
Mar 04, 2013 - 08:03 PM
No problem. Glad to be of service.