"Hi COPD Family, awhile back someone inquired about how in the world could they keep their tubing from tangling. This is a really big problem, so aggravating. Well here's a tip I hope that will help. What I do and I have tried probably everything there is, but I will run the hottest water possible and fill the sink somewhat, I will drag the tubing thru the water letting it set for a couple minutes dragging it thru the hot hot water. As your dragging it thru, also be drying it with a cloth hence stretching it out at the same time, this will straighten it out and will not curl up as your remolding/reshaping the rubber tubing. I do this for my tubing to my 02 machine and also the nasal canula's, If it starts to curl up in time then just repeat the process. This also helps from getting kinks and tangles. This is the only thing I have found so far that works. And I have tried everything I could possibly try. I hope this works for you like it has for me. Good luck and take one breath at a time.. "