This is a really simple 'able. It's my second so I'm not getting into anything too serious yet...If you liked this you might like my wall powered dual-fan solder extractor with a dynamic fan. So let's get started.
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Step 1: Materials
All we really need is a 1 1/2" tube, some steel wool, a screw, and something to mount it to - for convenience and also because it would be best not to just leave it on its own, as it would be very unbalanced.
Step 2: Stretch Steel Wool and Mount the Pipe
"Stretch" the steel wool with your hands as much as you can. Now mount the pipe to whatever it is you're mounting it to.
Step 3: Roll Steel Wool and Insert Into Pipe
Roll the wool and push it into the pipe.
You're done. Was that hard?