Tested and trusted recipe as shared on Facebook that is extremely efficient
All you need is: 1 onion and 1 teaspoon of baking soda.
Preparation: first chop the onion and then add the baking soda. Place the resulted mixture in the corners of your house, in the kitchen and in the bathroom.
Very soon you will notice dead cockroaches on these places. Repeat this process every day and you will get rid of them forever.
NOTE:
Baking soda is different from baking powder