Go to a hardware store and purchase plastic stair protectors. Turn the protectors upside down with the little plastic tips are sticking up, and place on window sill.
Once your pet puts their paws on the little plastic pieces, they will soon realize that it makes them uncomfortable, and will stop using the windowsill to look out the window.
This works great and truly does save on windowsills.
By Cathy from Plainfield, IL
