I have made many very good beers. But as of a few months ago almost every batch has been sub standard with off flavours I can't quite diagnose. Then one of my last brews came out fabulous a basic pale ale. So I asked my self what was the one difference. And I think it may be my auto siphon has gone bad? This particular good batch was fermented in my spiedle fermenter and instead of racking it to the keg I used the tap and a new bit of hose. The other thing that leads me to the auto siphon is that in every case the beer tasted really good prior to kegging. I hope I'm right cause I can't stand the thought of throwing out any more beer.