To clean a Prestige pressure cooker, start by washing it with hot soapy water, rinsing thoroughly, and drying it to prevent watermarks. For tough stains, mix baking soda and lemon juice or vinegar, then boil this mixture in the cooker for about five minutes before wiping it clean. Remove and soak the detachable gasket in hot soapy water, allowing it to dry completely. Also, clean the pressure regulator periodically. Using a stainless steel cleaner can help maintain shine for polished models. Regular cleaning will keep your Prestige tri ply handi pressure cooker in excellent condition