PSA: check your grinder burrs, mine quietly went bad and ruined a month of brews
Last Wednesday I brew a cup from my usual Ethiopian beans and it tastes like wet cardboard, so I pull the burrs and find a chip and a bunch of old grounds caked in there. I had been blaming my beans and my water for 4 weeks when the grinder was the real problem the whole time. How often do you all pull your burrs to check them, or do you wait until a cup tastes off like I did?