Borax is a readily-available laundry product that's excellent for killing roaches. For best results, combine equal parts borax and white table sugar. Dust the mixture any place you've seen roach activity. When the roaches consume the borax, it will dehydrate them and kill them rapidly.
A concoction of baking soda and sugar is an effective cockroach killer and controls the multiplication of these pests. Sugar acts as a bait to attract cockroaches and the baking soda kills them. You just need to identify their hideouts and sprinkle this mixture in those corners.
Raid Ant & Roach Killer Insecticide Spray was found to be one of the most effective at killing cockroaches. A can is helpful for the times when you spot a roach in your home and you don't want to get too close. A roach spray should kill the bug almost instantly.
Roach Repellents
Peppermint oil, cedarwood oil, and cypress oil are essential oils that effectively keep cockroaches at bay. Additionally, these insects hate the smell of crushed bay leaves and steer clear of coffee grounds. If you want to try a natural way to kill them, combine powdered sugar and boric acid.
Baking soda and sugar
You can try this method to eliminate the producers of the eggs. In a small container (or a bottle), make a mixture of equal parts baking soda and sugar. Sprinkle it at places where you've seen cockroaches. This is one of the easiest roach killers.
Distilled vinegar does not kill or repel roaches, making it completely ineffective. Distilled vinegar will help keep your kitchen clean, giving cockroaches less to snack on. However, roaches can live for months at a time without any food at all, and they will eat almost anything to survive.
Roaches don't like the scent of mothballs, making them an effective pest repellent. Mothballs can only keep cockroaches away for a year or two since the pests adjust quickly and easily to new environments.
While bleach is ineffective when it comes to killing cockroaches, it does repel them. But, bleach should only be used with extreme caution, as it is toxic when ingested, and has the potential to bleach or damage anything it touches. When it comes to deterring roaches with smells, bleach may not be the best option.
Finally, if you're looking for what kills cockroaches instantly, Raid Ant & Roach Killer Insecticide Spray just about does the trick.
Boric acid: Used correctly, boric acid is one of the most effective roach killers. It's odorless, has low toxicity to pets, and since it isn't repellent to roaches, they will not seek to avoid it, crawling through it repeatedly until it kills them.
Boric acid is one of the best home remedies to get rid of roaches naturally. Mix equal amounts of boric acid, flour, and sugar to make a dough. Set balls of dough around the home where cockroaches can feed on it. The flour and sugar will attract the roaches while the boric acid will kill them.
Cayenne, Garlic, and Onion Powder
Walk around your home and sprinkle all cockroach-prone areas with this spice mixture. Cockroaches can't stand the smell of these spices and will avoid all areas sprinkled with them.
They can be found in many supermarkets and convenience stores (including CVS Pharmacy and dollar stores) and are generally sold in the aisle where you can find laundry supplies. The smell of mothballs is unmistakable and hard to miss.
Moisture. Roaches need moisture to survive and this search for water will bring them into even the cleanest of homes. Leaky pipes and faucets are one of the most common attractants for cockroaches and is one of the main reasons you often see them in bathrooms, kitchens, and laundry rooms.
Indoors, seal off larger openings with caulk or silicone; soapy water helps ensure smooth application. If you choose to close off gaps on the outside of the house, look for silicone or caulk designed for outdoor use. Foam works nicely for smaller holes and cracks, thanks to its thin applicator.
Boric acid and vinegar cleaner is effective on windows or other glass surfaces. When mixed with a few other ingredients, boric acid and vinegar combine to make a dish detergent, disinfectant for wounds and even an ear wash for pets.
Rubbing alcohol will not stop the roaches from coming into your house, so squirting it around doors, windows and holes won't do any good. The best way to deal with roaches is with a professional pest control expert.
A spray bottle mixed with three parts fabric softener and two parts water can be an effective way of eliminating cockroaches. The chemicals within the fabric softener suffocate the roaches. This method only works if the cockroaches come into direct contact with the mixture.
Boric acid is a prefect bait to prevent cockroaches. Mix one part of boric acid, one part of white sugar and one part of wheat flour, and spread the mixture all around the infested area. This mixture will help in keeping the cockroaches at bay due to the harmful effect of the acid.
Kill Roaches With Baking Soda and Onions
Dice a handful of onion, sprinkle it with deadly baking soda, and voila! A great, natural roach-killing hors d'oeuvre to serve anywhere roaches like to dine.
Chlorine bleach can kill cockroaches and act as a deterrent due to its strong smell. Its corrosive properties can eat away at cockroaches' bodies, resulting in death. Bleach is only effective if a cockroach is soaked or drowned in it.