They allow the pee to go right through the PUL. It just started happening this week. Like putting on a fitted with no cover. These are not old-the tags are still somewhat crisp even though I got them used. I don't use fabric softener, the previous owner didn't, and they are absorbing lots, it's just going right straight through.
I have no idea why PUL would do that. But, maybe a bottle of Permanent Water Guard or Nikwax would help. I use PWG and never have leaking or wicking with my cotton outer covers or AIOs, so I would think it would do the trick.
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