How do you do it in your home?
In my home, if a roach appears, the kids will stand around and scream: There's a roach!!There's a roach!!
And they will stand on the sofa and watch it. If it stops moving, they will still stand around and scream some more. As if the screaming will kill the roach. No active action to kill it. Not even with bug spray!!
I have observed others spray a whole canister of pesticide at the insect.
From what I know, 2 squirts are actually sufficient to kill the roach.
In my home, how much roach spray I use will depend on how fast moving the roach is and the size of it. The faster and larger it is, the more I will spray.
Another method commonly used in my home, by yours truly most of the time, is to whack the roach with some old newspapers. That's bound to kill it. This method is used if the roach is fast moving and it will disappear into some corners by the time I get around to getting the bug spray.
But if your aim is not as good, or if you have poor hand-eye co-ordination, I would recommend dropping a pile of newspapers or magazines on the roach. This way, you have a bigger margin of error. But you will also end up with a bigger mass of mess that you have to clear coz by dropping those magazines on the roach, coz you will end up with a roach "penyet". (Penyet means flattened in Malay).
There are of course other ways to kill roaches, like buying commercial roach traps, which lure the roaches and then trap them with an adhesive. You just have to buy them and leave them in places where you normally find them.
There are also numerous homemade roach baits which you can make using boric acid, flour and cocoa.
But the best thing to do is to keep the home clean. Clean up spills and crumbs immediately, keep food away, empty trash frequently, fix leaky faucets (roaches are attracted to water) and leave some naphthalene balls around - roaches hate the smell!!
How are roaches killed in your home?