help clean me an droid screen not using cloth or foam

[mobomola]

hi,
please help in cleaning my android screen but not using cloth or foam etc but by using some settings. Because clicking on the close button X does not close the app or android settings windows box.

https://drive.google.com/file/d/1vwg9k152CyHlNAk57yVenuCbfbEmRctG/view?usp=drivesdk

Thanks.