This is a simple clean screen cover for your Ender 3.

Attached I have supplied you with a few options:

a cover with the ender logo (printing now, will upload photo once done)

cover with nothing for a sleek look or for you to crate your own

and one with a peg hole for your own attachment.

Recommendations: 

if your logo or design has smaller details like the one in my photo, use a smaller layer height. Ironing creates a smooth surface on top surfaces but can effect detail quality as shown in photos. (could be my fault). 

10% infill

Enjoy!