Boric acid is one of the best home remedies for roaches if you are keen on taking the DIY approach. 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.
However this is not the best with little kids around as they might munch away on your dough balls. In which case you can better use baking soda !
Take equal parts of baking soda and a pinch of sugar in a shallow bowl, then place it near to the cockroach-infested areas or in where roaches are usually roaming at your house. The sugar attracts the cockroaches while baking soda will kill them.
Another natural remedy is Diatomaceous earth. Diatomaceous earth is non-toxic to pets and humans, but it kills insects by destroying their exoskeletons. The roaches will take the “bait” back to their nest and feed it to the other roaches, who will also die. I’ve bought Diatomaceous earth in a health food store but you can buy it also online

Call in the pros. They will find any nests.

A very long tme ago we had them in our home and we had to call in a professional,nothing worse!

Good question; following the answers.

if none of the everyday products work maybe call in a professional.

Coca cola in a saucepan works

Aldi’s have a great surface spray. When cockroach’s walk over it the lay on their backs and die within a few feet of your surface sprayed. Spray inside sliding door tracks and doorways as well as your garage door opening and your outdoor lockups like workshops and garden toot cabinets.

surface spray around doors and windows does the trick here but a friend of mine swears by bug bombs

there is a gel that yu can put around that they eat and take back to their nest,

Borax! It works wonders with all those creepy crawlies!

they make a cockroach specific spray which I’ve found works well

I surface sprayed around all doors and windows and this really helped, suddenly they were gone. I looked outside and could actually see them dying very quickly, they just have to touch it and gone.

there are some good pastes around and diy pest control sprays that will help

awesome comments here. hope it all worked out.

JudyK has a great approach to the problem, we put out the baits every 3 months and use spray when we see the odd one. Luckily that has worked. I did not like having the pest control in when the children were little.