hygiene

Does anyone know of a detergent similar to Cleanskin for tank cleaning? I've been trying to find a safe tank cleaner, and have been recommended Cleanskin, but I can't get it where I am

Does anyone have a good protocol for cleaning variable capacity stainless steel tanks? We currently use hot water and steam, but this is either not effective enough or too time consuming. We have been considering trying a caustic-acid wash, but I'm not sure how safe this would be with the moving...