The internal filter is still there. Maybe i should just leave it aloneSome had an externa replaceable filter here
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If the internal filters have decayed, then the cannister needsto be cut open. There should be a seam where it was glues or welded together.
Have a big coffee can or tray to catch the charcoal after you open it.
As long as charcoal isn't getting through, then I can't think of any reason to open it up.The internal filter is still there. Maybe i should just leave it alone