I'm getting to transfer my first batch into a secondary, and I practiced using water. I'm not understanding what I'm doing wrong, but my auto siphon does not seem to be working properly. I get the siphon going just fine, then it eventually starts pulling in air and sending lots of bubbles into the siphon and the receiving vessel. Is there a trick I am missing, or is it possible I have a faulty siphon? No way am I going to rack with all the air I am seeing in my tube!