Anyone who has a JK Wrangler should be familiar with the streaks that come after washing or a good rain. The water seems to collect behind the mirrors and slowly drain out down the door leaving behind an unsightly streak.
We have worked out a little fix for this annoyance that requires a small drill and some steady hands.
A simple fix to this problem is drilling a small drain hole that allows the water to freely flow out of the bottom of the mirror instead of seeping.
What to do
Using a 5/32 drill bit, drill a small hole in the bottom of the plastic mirror mount. Get as close as you can to the door surface. Be careful not to drill into the door.
After drilling both mirrors you will notice the water drains from the mirror quickly and will not leave behind those nasty streaks.