Main Category :Sanitation Sub Category :Sanitation Neelaratna Geekiyanage It is a well known fact that prolonged use of mosquito coils is bad for health. But on the other hand sleeping under sweaty mosquito nets is very uncomfortable. Therefore I was doing various experiments for years to invent a low cost herbal mosquito repellent (HMR) which can be used in place of harmful mosquito coils. After many research studies one day my endeavor was successful. I simmered small pieces of betel leaves in a solar cooker for about two hours. Then I filtered it and separated the liquid. I went to the garden and applied it on my legs hands and cheeks. All mosquitoes around me disappeared at once. Then at night in my bed room I put a little amount of HMR into a 1.2 w diffuser (made by me) and switched it on. I was able to sleep comfortably without any mosquito coil or net, free from any mosquito attack.