Dry steam written into pharma sanitisation SOPs
Chemical cleaning cycles at batch changeover took hours and left residue to test for. Super-heated dry steam did it faster with nothing to rinse. The physics was never the problem; a method that is not in the SOP does not exist in a validated plant.
So the work was the document: validation protocols QA could defend, then the regulator. The method entered Indian FDA recommended pharma workflows and ran on production lines at pharma manufacturers and at Delta Corp.