Fuente: WIPO "tomato" The invention relates to a device with openings starting slightly inside from the edges of extended front faces and extending to side faces acting as an operating surface. Openings are made on all edges of extended front face providing cross ventilation for air to pass through these edges into the device and makes it easy for air to come in contact with non-volatile or less volatile chemicals inside the device and carry the chemicals outside easily from adjacent opening with it. Additionally, the chemicals inside the device are made in tablets form and not in powder form to avoid a layer of packaging like Tyvek or poly foam for ease and carrying through direct contact.