How do I increase friction holding lower mirror in place?
When I wash my F250 Lariat, it is easy to move the lower mirror when drying them. Is there a way to increase the friction which holds the mirror in place? Below are holes under the housing showing the cameras and don't know if those are weep holes for rain or if there is a screw/nut I can tighten to keep my mirrors in place once adjusted.
Thank you for any suggestions.

Any of these holes allow adjusting mirror friction grip?

 

Never heard of tension adjustment. Doesn’t mean there aren’t any. Last resort, cut a piece of an o-ring of the correct diameter and wedge it between the mirror and housing.

 

Same thing happens on my '22 F550 after washin it... very annoying, I end up just being gentler on the lower mirrors when I dry them. I know, not of help, but my 02 F350 doesn't have that worry with 22 yr old mirrors..

 

In the picture under the mirror those are the puddle lamp and the outside ambient air temperature sensor.

The top glass just pulls/pops out and there are tabs that can be adjusted. I don’t know if the bottom wide angle glass is mounted the same or not.

 

I have not attempted yet, but will remove that lower mirror to see if there is screw or some other method Ford uses which would increase the friction. If I am successful I will post here. I plan on using the YouTube video link as a guide to getting the mirror off. ✌

 

The mirrors can be popped out. utube has plenty of how to's you may find a way. I don't bother as they stay put once set.

 

So this is the tension system for the lower towing mirror. The torx screw is as tight as it can go. There is no way to increase the friction so that the mirror stays in place more securely. You could remove the metal center and try to bend the arms to get more tension but I figured I would just screw that up so I just left alone.

 

How did you get to this access?
As to tightening it up, how about slipping something between the metal tabs and the nylon tension piece?
Maybe some tubing of some sort?

 

If you look at the video I posted before the photo of the mirror friction system, there is a demonstration on how to pop off the mirror. It is quite easy, you just have to be gentle. That white nylon piece in the center applies pressure to the black plastic piece surrounding the white nylon. It is the black plastic part that the mirror clips onto. So to make the movement require more force, you would need to wedge something between the white nylon and black plastic.

 

But, if you wedge something between the metal tensioner and the nylon, then it will have more tension against the black plastic part.
Of course, were it me, I would bend the metal tabs to make more tension.