Hit powered pump water pistol filled with water/vinegar mix.
Not harmful, but will "educate" the moggy about it being miserable to mess with your screens.
Also - if it's legal in your district - why not look into hiring the sort of equipment ta makes electric fences work? Hook it up to your screens and it will make the fucker run....
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Overhead, the Albatross hangs motionless upon the air,
And deep beneath the rolling waves,
In labyrinths of Coral Caves,
The Echo of a distant time
Comes willowing across the sand;
And everthing is Green and Submarine
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