What kills cockroaches instantly? 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.
Why can’t you squish a cockroach? Cockroaches have extremely strong and flexible exoskeletons, which make them almost impossible to squish, withstand the hardest stomp or the toughest newspaper. They can also flatten themselves to fit into tight spaces and crevices, making for an easy getaway.
Why do cockroaches run so fast? The secret is in their legs. All six legs have three knees, 18 knees altogether. With so many joints, their movement has precision and accuracy, with very little wasted movement that could slow them down. Once they get up to speed, they rise on their hind legs and run as humans do, which helps them run even faster.
Are cockroaches immortal? Myth #1: Cockroaches are immortal.
False: While it might seem this way at times, there are ways to kill them. Now it can be tricky because they are smart and resourceful. A cockroach can live without its head for a week as they can breathe through other body parts.