For the
rust cry for help... I would suggest scrubbing off what
rust you can see, first, with baking soda (bicarbonate of soda) paste. Once the cooker is clean, use a dab of oil and polish the cooker. The oil will act as a barrier between the moist air and water that would otherwise feed the
rust. It will be a problem from here on out, but if you treat it regularly with a bit of oil, it will lessen the likelihood of the
rust returning to say hello!