Black out screen on Prime4

Not sure this is the correct place to post this but after several events I notice that the screen on my prime 4 gets messed up by finger prints and even sometimes wind blowing across the screen will cause issues when you try to do something on the screen. Pretty much anything going across the screen effects it now that I have been monitoring this closely. Is there a way to add a way to turn the screen black? another words with it blacked out touching it will not do anything as long as the screen is blacked out while in the middle of a gig and then turn it back on so we can maybe clean it with a micro fiber cloth or something so it doesn’t effect what is playing when something goes across the screen like wind, or a single droplet of drizzle this I think would be a big help. Anyone else having this problem???

Just put it in search mode if you want to clean it, the worse thing you’ll do then is type a load of letters in if the microfibre cloth registers as a touch.