Thermal Fogging Outdoor 1 Liter By Herbal Strategi Product Description Keep mosquitoes, cockroaches, and flies at bay with Herbal Thermal Fogging ? Just Spray. This thermal herbal fogging solution is the safest way to kill or repel pests without any chemical use. Here is what you need to do: Pour 30 ml of our Natural Thermal Fogging Liquid into 1 liter of kerosene or diesel. Pour this mixture into the Thermal Fogging Machine and fog outdoor areas & public places.