A hydrogen peroxide sterilization process will involve H2O2 vapor filling the sterilizer chamber, speaking to and sterilizing uncovered unit surfaces. Microbiological monitoring consists of employing settling plates/swabs on completion of the decontamination cycle after which you can periodically until eventually another decontamination cycle is scheduled. VHP sterilization in OEB4/OEB5 https://vhpsterilizationprocess59146.tnpwiki.com/167210/little_known_facts_about_vhp_sterilization_validation