My experiments with Teflon~R coated dragon eggs encountered numerous setbacks. They also brought a number of surprises and, I am happy to report, a number of successes. I described in the first article in this series how I had revisited my initial experiments. In the second time round I recreated the crackling phenomenon but ran into problems with my sparklers. These either refused to ignite or, when they did, refused to stay lit. I soon tracked the problem down.
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