What Is Channeling and How to Stop It
Espresso channeling ruins shots by letting water tunnel through the puck. Learn the telltale spray, the real causes, and the…

A perfectly maintained machine still pulls bad shots if the grind, dose and technique are off. This section is about extraction: dialing in a new bag of beans, fixing sour or bitter shots, getting even flow without channeling, and steaming milk that pours instead of spluttering. We break down grind size, dose, tamp, ratio and shot time in plain language, then show how to adjust just one variable at a time until espresso tastes sweet and balanced. It’s the same process baristas use behind the bar, scaled down for a home setup and a single portafilter. Master this and your machine finally does what you paid for – café-quality shots in your own kitchen, repeatably, not by luck.
Espresso channeling ruins shots by letting water tunnel through the puck. Learn the telltale spray, the real causes, and the…
Dialing in new beans doesn't have to burn half the bag. Here's my bench-tested routine for a good shot in…
Learn how espresso brew ratio shapes strength and taste. Ristretto 1:1, normale 1:2, lungo 1:3 and beyond, explained by a…
Espresso grind size is the biggest lever you have over extraction. Learn to read your shot, adjust the grinder by…
Fix bitter espresso over extraction with a coarser grind, cooler water and shorter shots. Real bench-tested steps from a repair…
A repair tech's sour espresso fix: grind, temperature and ratio tweaks that turn a sharp, under-extracted shot into something sweet…
Learn how to pull the perfect espresso shot from scratch. A repair tech breaks down grind, dose, ratio, and time…