A method of dispensing periodic metered doses of a single phase aerosol composition wherein: the aerosol composition comprises a propellant and at least one active component selected from the group comprising fragrances, perfumes, air fresheners, deodorants and sanitisers; the metered dose spray rate is between 0.1 and 2 g/s of aerosol composition; and the mean particle size of each dose of the aerosol composition is between 1 .mu.m and 40 .mu.m.