Hii all, today I am going to review Laxman Rekha Chalk for cockroaches. Using it for last two days because of huge number of cockroaches in my home. But the result is not good. It just killing 9-10 cockroaches per day. My friend suggest me to use this and told it is very strong and 100% works but I don’t think so. It’s easy to use. I am drawing 15-20 lines on my kitchen wall per day. But result is not sufficient. It’s making my kitchen wall dirty. Don’t use it. Hit spray is batter than it. Try that.