The coachroaches are just too much. Small, big, slim, fat, young old. I will try the suggestions you have given me, if it doesnt work It will force me to move to another house.

Where do they come from?

That is where you have gone wrong.Look for cockrid which contains boricacid and the pests will be gone in a week or two.
Kuna watu wanauza herbal bolic and it doesnt work .Make sure you buy from a supermarket si huko nje whereby the potency of the boric acid may have been affected by sunlight and heat
Im talking from personal experience.I have tried bolicherbal and cockrid with boric acid

ati herbal?? kenyans & herbal stuff!!!

well thanks 4clarification, i'll pick one today.

Is the much publisied Blastamax any effective?

I think it also depends on the size of the house,the paste worked well in my very humble abode but what about bigger houses with 3-10 bedrooms complete with compounds,yards,lawns,gardens etc??...some places surely need to be fumigated.

Dawa hizo sote umeambiwa ikikataa...tafuta monitor lizard....yaani buru kenge....mende ndio part of its meal...ama ufundishe nyau kuwinda