I recently had an irreparable flat (ran over a rock) and replaced one tire. The TPMS sensor was replaced, too, due to damage. All the TPMS sensors used to read right on, as compared with my Longacre gauge. It's been a few days, and since the reset, they all read 3-4 lbs light. Do they self-calibrate further over time? If not, would another manual reset be helpful?