First off. This picture is vile and while I appreciate your need for assistance, you have ruined my day and I will be busy puking for the rest of the week.
To answer your actual question: I recommend just replacing it. Extra screen and cord is cheap and easy to install.
How do I get rid of the hard particulate matter embedded within my window screen ( lemmy.world )
I moved into a place with one very hazy window screen that is difficult to see through....