This product is one of the most popular. This product is work a very effectively and wonderfully. Its a very quite easy to use and anyone can easy handle. Its a just require a draw a line. Around the where is a cockroaches or ant. If the ground floor is of smooth titles, you may need to wet the tip of Laxmanrekha and then draw a more Line. Its a work better than other products. Its a always better use in a night. You can wash the area in the morning.