Spread the granola mixture over your dehydrator trays (I line mine with these "clean screen" tray liners
since this mixture is wet and can fall through large tray holes), and dehydrate at 135 degrees until dry. This time will vary depending on how well your dehydrator keeps its temperature, how wet your mixture is from the blueberries and water, as well as how thin you spread the mixture out on the trays. Should be anywhere from 12-24 hours. It will continue to crisp up as it cools too. You can dehydrate at a higher temp such as 165 degrees and have it dry out a bit faster if you want.