After a few of these five-minute sessions, you'll start to see that the individual stitches are disappearing and the fabric is getting smaller. Again, different yarns will felt at different rates, and some shrink more than others.
The fabric will start feeling more firm and solid and somewhat thicker as it gets closer to being done. Once you start seeing the stitches disappearing, start checking the pieces more often, every one or two minutes, to make sure you don't take the felting process too far.
