If cockroaches are too much to handle and your pest control guy is not helping you much in any way, then here is a trick to get away with it.
1. Just mix up equal quantity of boric powder in wheat flour and make a paste by adding water.
2. Now paste small portion of this mixture all over the area wherever u feel cockroaches roam around.
After a week you will notice that all cockroaches are vanished as if they never existed.
– submitted by shailendra