espresso puck preparation

https://howcleancoffeeequipmentplace.brightsora.com/posts/how-to-clean-coffee-equipment-a-practical-guide-for-better-brews

After pulling a shot, you tap the portafilter to release the spent espresso puck. It's satisfying when the puck comes out clean and intact, showing a good grind and tamp. If it's sludgy or has cracks, you know you need to adjust your technique.