You cannot open Nutroz during a cycle. For Nutroz to properly rejuvenate your items, the lid needs to be completely sealed for the ozone to stay locked in for the entire cycle. If ozone escapes, there may be a risk of ozone exposure. See user manual for risks in addition, your items will not be completely deodorized and will need another treatment cycle.
If you must open the Nutroz due to an emergency see below for emergency opening methods:
For the powered emergency release, press and hold both the “START” and “STOP/OPEN” buttons for 5 seconds. the Nutroz will beep after each second, and on the fifth beep the lid will unlock. An alarm tone will play to indicate possible release of ozone gas.
For the unpowered/manual emergency release, break away the bottom safety panel, and reach to pull the small silver handle which will release the lid. Manual release will involve possible escape of ozone gas. *NOTE: This method will make the device thereafter unusable.
User Manual