@Pepfam wrote: Have you checked to see if the cap for the old filter is stuck in the insertion site. That was my problem and the problem of quite a few others. Just look back where the filter engages. If that cap is there, grab yourself a pair of needle nose pliers and carefully yank it out. It was a lid stuck in the slot for me too! I can't believe this. I don't see how it could have even been working thru the last 2 filters.
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