you don't get this if you use reverse polarity.  dee

On 18 Oct 2009, at 19:38, Jeff Maahs wrote:


I'm getting a buildup of gunk on one of the rods. I haven't seen this on any of the videos or pictures. Is this normal?

Here's an image if it helps: http://tinyurl.com/yfdskwb

Thank you,
Jeff