I took apart a Camelbak Podium water bottle spout and I don't think I need to do it again. The little flange that holds the spout in did not 100% survive (you can see the tear) but it holds more pressure than the valve so even though it's looser than it was to start with, it's not coming apart during drinking. Still, repeated disassembly wouldn't be any more good for it. Both sides of the valve are accessed by hot soap and water if you just put the lid in the dishwasher.
