“Didn't come with any instructions for use. Even after watching numerous videos on the method, I could not get a decent whistle out of this. Further investigation makes it look like this is because the whistle itself is poorly made - with too much space between the windpipe and the bowl. Apparently you can fix it by melting candle wax and letting it cool in the bowl (effectively reducing the gap) but I haven't tried this and don't think it should be necessary.”
