to hear these vents are working well for you. they have been a real sleep saver for me, thats for sure. ( and cleaner too, as you pointed out). it does get easier to use them, you get kind of a muscle memory for how to open and close them in your sleep ... hard to explain.
sometimes it takes more time to get the gas out than others if the hole is partially blocked or something ... once i actually fell back asleep with it still open..don't do that!
it is so amazing i can not believe i have not had it all these years. thank you for your help here. 