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I think it might cause issues but I haven't made any effort to find a solution! There is always a point just off center that comes through quicker than the rest on the pre-infusion. I absentmindedly pushed the screen down on top of the puck rather than just gently placing it the other day and the channeling on that shot was insane.
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Woah, tell me it’s not the long one that faces the coffee? The top one shouldn’t be a problem as it’s similar to an espresso machine screw. It’s generally better to dose so the puck doesn’t swell against the screen anyway, as it’s thought to cause channeling.
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I haven’t managed to destroy my all steel one yet, and this might not help your issue, but when I pour the hot water into the basket I hold it at an angle and start right on the edge, splitting the stream, this helps to prevent the disturbance of the puck. As the basket fills I stay at that angle and overfill it to preheat everything.
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Bit late to this but are you pushing the screen down firmly? You need to get four fingers on it and press hard, I then quarter turn and repeat. Also don’t use a fancy expensive swan neck, if you must then heat a teaspoon in hot water and pour off the back of that to diffuse the flow until you can afford a cheap basic kettle.
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Philipflop
hangedup
withered_preacher
Ramsaye
@MCamb
Does anyone else with a robot find the little red grabber thingy on the shower screen fucks the puck up and causes channeling directly underneath it? I removed it, and it didn’t help as it leaves a larger hole. I then used 2 of the paper filters and that seemed to improve things, no channeling directly in the centre.
I don’t think it’s a long term solution though and wondering if anyone has experienced similar
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