I’ve been using the Stumptown method, which has you pour half the water, wait a minute, then there’ll be a crust on top… you want to break that crust with your spoon then give it a light stir. Then pour the other half of the water, wait til the 4 minute mark, press, and voila.

If you don’t stir in that crust, you’ll have unevenly brewed grounds. If you’re getting bitterness from stirring, try a coarser grind.