so how's the food scavenging going? You would be top ranking in the event of an apocalypse in India. I've read roaches can survive nuclear radiation. What a bright future! If the nuclear fall out won't kill you, the fact that you can only eat roaches might!
atleast you will have something crunchy munchy to bite on, while others will fight over each other's flesh!
You seriously want a piece of advice, coz I had a similar problem and I used all sorts of methods from Hit spray to that Lakshman Rekha Chalk. Well at last I found this and it works wonders. Yes, it really does if you wanna end the Raoch invasion.
if you seriously wanna get rid of roaches.. Mix some boric acid powder in wheat flour and make them into small balls. Place these balls in the infested regions.