I noticed that too and started putting less in the bladder and refiling more often on my training rides, after a few weeks though it seemed to stop doing it. I had a few rides and a drive where I got caught in the rain at the end of that period. The drive the top was open and bladder was out which got some water into the frame, I dried it out and that seemed to be about the time I noticed it was gone.

I have had my shiv for 2.5 years and always use it. I lived in fl for much of that time. If I haven't used it in a week I will run vinegar it bleach. Maybe I just have a high tolerance for crappy tasting water.

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"In the world I see you are stalking elk through the damp canyon forests around the ruins of Rockefeller Center. You'll wear leather clothes that will last you the rest of your life. You'll climb the wrist-thick kudzu vines that wrap the Sears Towers. And when you look down, you'll see tiny figures pounding corn, laying stripes of venison on the empty car pool lane of some abandoned superhighway." T Durden

I am in orlando so I know the quality water you speak of. In this case for me it was almost like an absorption a taste from the frame to the bladder when it was full and sweating. The bladder alone did not have the taste I am speaking of and it would only show up after about an hour into the ride.

Ouc spent millions to create a reverse osmosis system so you would brag about their water. Trust me, I was an auditor there ;). But everyone else's water was bad.

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"In the world I see you are stalking elk through the damp canyon forests around the ruins of Rockefeller Center. You'll wear leather clothes that will last you the rest of your life. You'll climb the wrist-thick kudzu vines that wrap the Sears Towers. And when you look down, you'll see tiny figures pounding corn, laying stripes of venison on the empty car pool lane of some abandoned superhighway." T Durden