I use the GPS all the time and have adopted two work arounds for this issue.
1. Using a small piece of plastic (2" x 1") I formed a deflector that slides into the AC vent and directs a small amount of air to wash over the windshield mount of the droid. It doesn't take much air to cool the device while in GPS but on a hot day with no air flow that area and the phone get quite warm in direct sunlight...maybe the windshield mount shouldn't be black!
2. Using a 6" x 6" piece of a notbook paper placed over the back of the windshield mount keeps the phone and the black mount out of the sun and in the shade. The paper has no impact on the GPS reception and all seems to work good unless the car is sitting in direct sunlight for a long time...use method #1 above.
1. Using a small piece of plastic (2" x 1") I formed a deflector that slides into the AC vent and directs a small amount of air to wash over the windshield mount of the droid. It doesn't take much air to cool the device while in GPS but on a hot day with no air flow that area and the phone get quite warm in direct sunlight...maybe the windshield mount shouldn't be black!
2. Using a 6" x 6" piece of a notbook paper placed over the back of the windshield mount keeps the phone and the black mount out of the sun and in the shade. The paper has no impact on the GPS reception and all seems to work good unless the car is sitting in direct sunlight for a long time...use method #1 above.