BeerBottleScrubber

This is a glass carboy bottle scrubber. It will likely scratch plastic carboys. Takes caked in guck and loosens it right off.
Requires 2 25.4mmx3.1mm rare earth magnets (got mine from lee valley)
use:
Snap in one magnet to the scrubber.
Fill Carboy with a bit of water
Lay carboy on it's side
slide the scrubber into bottle
Use second magnet to move the scrubber and take off the gunk!