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Step 3Wrap the steel wool around the exposed copper
Do as the title says!
The key here is to have the right amount of steel wool, not to little where you might not get contact, and not to much where you might not get enough amperage to explode the wire. Hopefully the picture will give you a hint as to how much to use, but you can always practice by doing a "dry run". To do a dry run, stop at this step and try to "detonate" the steel wool - if it explodes with a BANG and some sparks that was a good amount, if not, increase or decrease and try again.
The key here is to have the right amount of steel wool, not to little where you might not get contact, and not to much where you might not get enough amperage to explode the wire. Hopefully the picture will give you a hint as to how much to use, but you can always practice by doing a "dry run". To do a dry run, stop at this step and try to "detonate" the steel wool - if it explodes with a BANG and some sparks that was a good amount, if not, increase or decrease and try again.
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btw it wouldn't really "explode" just get very hot and melt
the popping sound is the metal contracting in the heat