My YBODs mouthpiece one way valves tend to freeze before dive when there is some deg below C. Gently blowing in by one side of the mouthpiece and holding my hands around it usally fix it. Any good tips? Soaking the rubberflaps in silicone is maybe not a smart thing to do?
And the second dive on a cold day, when your scrubber is like one piece of ice, you learn to do your pre-breathing
Robert