A method of decontaminating air from lipophilic airborne contaminants (e.g. lipid enveloped virus) comprising delivering soap bubbles into the air, wherein the soap bubbles comprise a solvent and a surfactant. Preferably the surfactant is sodium laureth sulphate and/or sodium lauryl sulphate. The soap bubbles may further comprise an evaporation suppressant such as glycerol, polyethylene glycol and/or corn syrup. In one embodiment the lipophilic airborne contaminants are lipid-coated viruses, such as coronaviruses like COVID-19. The method can be computer-implemented and comprises a decontamination signal transmitter which transmits a wired or wireless decontamination activation signal to the air decontamination apparatus, which in response, produces and delivers soap bubbles into the air. There may optionally be a decontamination deactivation signal which ceases production of the soap bubbles.
