Press Release – Pharmaco A natural dry fog sanitising system made in New Zealand is now available for whole room decontamination and is as effective as any chemical based cleaning. The dry fogs active agent is naturally occurring hypochlorous acid or HOCL, a super disinfectant … A natural dry fog sanitising system made in New Zealand is now available for whole room decontamination and is as effective as any chemical based cleaning. The dry fog’s active agent is naturally occurring hypochlorous acid or HOCL, a super disinfectant made by passing an electrical current through a water based solution. Tiny amounts of HOCL are also found in white blood cells when the body fights infection.