Does your monitor have a hood? If not, you can easily make your own with some cardboard, adhesive-backed Velcro, and a can of matte-finish black paint.
I googled hood. Thanks I didnt thought about such easy solution. I used to have a hood on my old CRT screens.
I will check out see how this works. Probaly will do. Remmembered that didnt react to this in the old CRT days.
Thanks and cheers,