Glare from dashboard ..

Every car I've ever owned has had this issue. I suggest getting polarized sunglasses. This will help.

 

Maybe try a black dash mat/carpet?

 

I agree. The dash does reflect the bright sun if caught at the wrong angle, especially for the taller driver.

 

Some people have also added a tint strip to the top of the windshield.

 

At some point, due to either sun angle or windshield angle there will be some reflection of dash on the windshield. Some cars more than others. You can reduce reflection by covering with a black "DashMat" or similar. Otherwise, don't apply anything on the dash that will shine it up.

If reflections on windshield become too glaring, change direction!

 

I noticed that too briefly when I got mine, but I wanted to protect that huge dash and got one of these for both my Prius and my Venza
DashMat Limited Edition Dashboard Cover - Best Price & Free Shipping on DashMat Ltd Edition Dash Covers

Works really well and keeps the dash clean. And hugs all the curves, comes precut for all the vents and sensors.

 

If you stick some velcro on the case, it will stick to the mat. I wouldn't put knick knacks on the dash... and make sure you never put anything over the airbag cover. If the airbag deploys, the knick knack or whatever will become a missile. Not good if someone happens to be in the way.

 

It will stay better than on the dash, but the velcro tip is a good suggestion.
It's not like the thick carpets ones, it's a much thinner cover, but it sits flat, looks nice and feel like it will hold up for a long time.
It does come with quite a bit of velcro to hold down the mat, 4 long strips you cut up and stick on your dash.
If you get one I suggest laying the mat on your dash a few days without using any, let the basic shape of your dash form the mat a little, then you will find you need much less velcro.
I used 2 of the strips cut up obviously, and it has never moved on me.
Thinking about it some things would stay, like if you put your wallet or something like that or maybe even a glasses case it probably would stay, but I keep my car really clean so I haven't tested that theory.

 

The windshield on the Prius has always bothered me in regards to reflection. They have such a steep angle/rake that you are actually looking through the glass at a refractory angle. It sort of like the sloped armor effect on a tank turret. Not much that can be done to eliminate the glare and haze but to keep the glass as clean as possible. That in itself seems like a full time job.