TRIED:

• Pepper
• Cat deterrent sprays
• Covering area with thorny grating
• Plastic grids with pointy cones
• Cat deterrent pellets
• Collecting prickly tree droppings and spreading around
• Lemon Juice
• Vinegar
• Cayenne pepper
• Telling neighbor, her putting out cat litter, then the possums and raccoons throwing it all over the place
• Clearing area to just dirt -- possible VICTORY
• Next day cat covers my windshield with paw prints

HAVE NOT TRIED:

• Ultrasonic laser
• Water sprayer
• Peppermint oil