Originally Posted by noremorse1
the problem may also be the rubber seal within the auto siphon.
This is what mine does. The rubber seal around the racking cane sucks. Fermtech has been having some problems with it, such to a degree that they've come out with an "improved design
I will say that, despite the annoyance of bubbles you can't get to stop and the worries of oxidation, I entered a Kolsch at a comp. that I was worried was going to show oxidation later. Got second BoS.
The bubbles are still a pain in the ass though.
Take a very little bit of the beer you are racking and carefully dump it in the top of the auto siphon. This will create a greater seal.