I just bought a Le Creuset whistling kettle. Expensive. Problem: it hardly ever whistles! I can't see there's more than one way to put the stopper in, so I just can't imagine what I might be doing wrong -- my first thought, since I'm a very low tech person.
Incidentally, on a website someone reviewiing the kettle complained that it "shrieked". I wish mine did.
Any suggestions (other than return it)?