I always remove the tubing to ensure a good thorough cleaning. I have three tips for easier removal (it's still a pain in the a$$). First, don't put it on too far to begin with. Second, run it under nice hot water for a while. Third, don't try to pull it straight off. Grab the tube at the end of the siphon and bend it at a 90 degree angle while also pulling. This will loosen the seal on the outside of the bend enough to let it move a bit. Then bend it the other way and do the same. Usually takes 3 or 4 cycles and it's off.