I'm sur a lot of you have seen this video from James Hoffmann discussing the massive differences observed when spritzing some water on the beans before grinding.
So I took the plunge and bought a spray bottle, and tested it immediately on my mildly-disappointing, home-roasted medium-light Yrgacheffe in my Mythos-modded DF64.
Of course I don't have a particle analyzer to replicate the results, but I can still count on my senses to see if there is an actual difference between dry and spritzed beans.
The beans were dialed-in at 18g in, 45g out, 30s when dry.
Then, the 3-spritz beans went in. I didn't see much difference when grinding (maybe a bit less retention), but when pulling the shot, wow. It started to drip much later and slower, and took around 42s to complete the shot. There was a bit of spraying so channeling may still be happening though. The taste was incredible compared to the baseline. Every flavor was turned up to 11, with much more body, sweetness and complexity, with still a clear acidity cutting through the syrupy goodness, and a taste that lingered in my mouth for a very long time.
I dialed back the grinder for a 30s shot. This one was very disappointing and obviously under-extracted: sour, with a lingering astringency, and the flavors were kind of muted. So the beans really seem to benefit from extra contact time with seemingly no drawbacks in terms of overextraction, or the initial delay acted as a sort of preinfusion.
So my takeway is this: invest in a $£2€ spray bottle, either dial-in with dry beans or aim for a 35-45% longer extraction compared to your baseline, and enjoy!
Have you tested it? What are your results?