It's sort of the reason I bought a plain ole stainless steel racking cane, got sick of the auto-siphon being stupid all the time. To start a siphon, I just put a 3 or so inch larger piece of tubing over the end of my siphon hose, suck to get siphon going, allow it to run into a separate vessel while I clamp the hose. Then, I either spray the end of the hose or let it sit in sanitizer for a bit before siphoning the rest into my fermenter or keg. My mouth doesn't touch anything the beer touches, voila, siphon started.