At the end of each arm is a small ball of fine-grade steel wool, which will emit sparks for a few seconds when lighted. All you’ve got to do is get the 10 pieces of steel wool alight at the same ...

Choose medium or coarse-grade steel wool over a fine one, says Bossel. "The medium and coarse types offer a robust barrier ...

Once the fire is out, the steel and bowl will slowly cool down. Make sure the steel wool is a very fine grade. Make sure the steel wool is dry, clean, and not rusty. Your battery may be too weak ...