Maxforce FC Magnum has a three year shelf life if stored away from extreme temperatures. Maxforce FC Magnum should be reapplied every 2 weeks. Any gel that was previously applied should be cleaned (sometimes it may be necessary to scrap away any gel that has become hard on the surface) and dried prior to applying the fresh bait.
We would recommend using a variety of products to combat the roaches. Maxforce FC Magnum is a very good bait gel to use. You will put the gel in small place points in problem areas, such as around stove, microwave, counters, drawers, etc. You should also use Temprid SC insecticide. You will use 8 mL per gallon of water. This will be sprayed along the baseboards and cracks and crevices indoors and around the perimeter of the home. We would also recommend mixing Temprid SC with an IGR, such as Gentrol. This will stop the roaches from reproducing. For longer control, we would recommend using Delta Dust Insecticide inside the wall voids with a bulb duster. You will take the light plates and electrical sockets off the wall and do a couple of puffs per hole.
You will make sure that you are not spraying in places where the bait is. It will contaminate the bait and the roaches will not be attracted to it.
All of these things will help to contain the roaches and eliminate them. This is not an instant process but the combination of these products should definitely take care of your roach problem.
Maxforce FC Magnum is not a contact kill type of product, so they will not die as soon as they touch it. It will start to work on their system and they will start getting weaker and dying within a few hours of contact. However, please keep in mind that roaches are difficult to control, so it will likely take more than 5 days to see full results. Moderate roach infestations can take a few weeks to get rid of, and severe infestations can take several months even when using all of the products needed (insecticide, IGR, roach bait), and sanitation is up to par. Please take a few moments to review our treatment article/videos on How to Get Rid of Roaches for a successful eradication program.
We would recommend using a combination of products in order to combat German roaches. First, we would recommend using a bait gel, such as Maxforce Magnum. It is a very good bait gel that has .05% Fipronil. You will place this inside cabinets, drawers, etc. Do not spray near baits, do not use heavy detergents or cleaners, or do not use in very dusty area. Gel will dry out and get a dry skin on top but roaches will still eat it up to a year. However, if contaminated or gone, reapply. An insecticide that can be used is Phantom Termiticide/Insecticide. You will use this in areas where bait cannot be applied. It is a crack and crevice treatment and can be used indoors. You will use 3 fl. oz. per gallon of water. We would also recommend using Gentrol IGR as well. This can be mixed with Phantom in the same sprayer. Gentrol IGR stops the roach life cycle. It works for up to 4 months.
These are all professional grade products that are not available in a local store. Please let us know if you have any additional questions.