1. A good start would have been to put a good camera in the first place because that one is absolute crap.

2. I'm not sure you can fix the exposure on "fairly cheap" dashcams.

3. "high-light" in night settings are likely much lower than standard daylight, let alone bright daylight.

Though I guess you could have an auto-exposure dashcam standard and add a low-light one which is only active in low light conditions.