Two problems. First, I just bought a Kuhn Rikon 7L Cooker with the standard release valve Item Number 3344. I hear slight hissing but I too thought there should be none. Hissing=steam escape=flavor escape. Second, after the first use there was numerous small rust-colored pits. I cooked 3 winter squashes with water only, a batch of fava beans, and a celery/onion/canned tomato recipe. The pitting appeared after the first use. Picture below. Is this supposed to be this way? I did not use vinegar or anything harsh as an ingredient. After each use, the pot was cleaned with liquid dishwashing soap and a plastic brush and left to air dry upside-down.
Should I use steel wool on it? I don't want to damage the finish. So far I've used a ScotchBrite Dobie to clean it. Picture also below. One of the reasons I bought the product was for the metallurgy. This is kinda disappointing.
Are there any other KR owners who can share their experience on how it works and advice?