I bought these beer line cleaning units from a company called Innserve. I've gone to 1 line clean a month. They've posted something about it on youtube (right at the end of the video) People keep saying to me " ah magnets don't work" Although these things send out some sort of strong signal and have no magnets. I would like to hear from anyone that has had magnets in the past but now has this system now. ( works for me)
http://www.youtube.com/watch?v=lWaxKZdMFuI