The Hario Woodneck brewer uses cloth filters that are not meant to last forever but I am looking to increase their usable age. As weeks pass, the flow rate of water through the filter noticeably slows down. In a brand new filter it seems almost constant from full to empty, but after a month or so the last bit takes ages to drain. What should I be doing to keep them 'alive' longer?

I am using the ones in the image if it matters. These are inserted to the hoop provided with the Woodneck.

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Before first use I soak the filter in boiling water for a few minutes as instructed. After each use I rinse it with hot water. Between uses I store the filter in a ziplock bag in the freezer.

Try putting a glob of coconut oil on the filter and then sprinkle a little baking soda and salt on too. Scrub with a stiff plastic toothbrush/nailbrush followed by a warm vinegar/lemon juice dosing, a final brushing, then a hot water rinse. This works well for ceramic mug coffee stains too :-)

  • What does the coconut oil do, exactly? – Stephie Oct 8 '17 at 6:06
  • A portion of the coffee stain is oil based. Coconut oil will help dissolve that. In addition, coconut oil is naturally antibacterial and antiviral which is a good thing when cleaning something like this I think. – Ken Schumack Oct 10 '17 at 16:37

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