Surface Touchscreen Problems: Appearing Points

Hello, I have a Microsoft Surface Pro Model 1796 and sometimes randomly there appear points like finger prints in the upper part of the screen and they even sometimes click what is open on the screen. For example when I have a window open they can close it or minimize it. Plus I can't use anything else on the screen. It is like it is frozen, even my mouse doesn't work, only my keyboard functions. I have to close my surface and re-open it to get the points to stop. I tried the instructions by Microsoft deinstalling the Intel Precise Touch and etc in the device manager but it doesn't help.Than