This document describes an herbal mosquito repellent invention called "DuruMaduru" invented by Neelaratna Geekiyanage. It discusses how through experiments simmering various herbal leaves, betel leaves were found to disrupt mosquitoes' ability to detect blood when simmered. The repellent is made by blending betel leaves with a small amount of water into a pulp and applying it to surfaces to repel mosquitoes without killing them. Instructions are provided on how to prepare and use the repellent. It is described as an effective yet low-cost and eco-friendly solution.