You can add NEKTON-Desi-Natural in a cold nebuliser and obtain germ-free rooms via its cold evaporation. Diluted (15% NEKTON-Desi-Natural to 3.5 liters of water) will give you, depending on the setting of the nebulizer, a filling for about 2-3 days. Please note: It is important that the device is a cold nebulizer because NEKTON-Desi-Natural loses its effect via a heating process!