A method of sterilising an object comprising the steps of i) placing an article to be sterilised in a sterilisation chamber ii) providing a sterilising mist (for example hydrogen peroxide solution) to the sterilisation chamber, thereby to contact said article for a first duration iii) providing a gas flow to said chamber for a second duration. thereby to displace, where present, said sterilising mist and to remove, where present. condensed mist from said article wherein the total reduction in micro organisms over a time period encompassing the first duration and the second duration is less than log 6 and wherein steps ii) and iii) are repeated at least once to achieve a predetermined sterilisation parameter such as a predetermined sum total of contact time between the sterilising mist and the article, a predetermined sum total of sterilising mist provided to the sterilisation chamber or a predetermined level of sterilisation.
