I have had my watch almost 2 years and I am about to use it for a multi-day cross country hike. In the last month or so distances are longer accurate, adding about a 10-20%. I know this because others in my group get different mileage, and I also hike in the same places all the time that have not suddenly gotten longer. Also 1 place I hike has mileage signs, and if I stop for lunch it adds a 10th of a mile. Anyone know a fix for this, I would really like to know how far I have gone when I am hiking 15-20 miles a day on my trip.