The squirrel's natural predators are: hawks, falcons,widcats, foxes, owls, racoons, opossums, black tailed jackrabbit, coyote, crows, badgers, rattlesnakes, and gopher snakes. Ever tried using one of them?
In the absence of real live predators, the predator urine is probably the next best thing. Predator urine frequently mentioned is coyote urine. Hang one or several near the
plant you want protected from squirrels. If you use coyote urine, you may also want to use the Hot
pepper Wax spray (you mentioned in your post) at the same time. Use the spray on
plants when the temperature is 40 degrees F and you know it will stay at that level or higher, never at below 40 degrees F. Spraying at lower temperature is harmful to your
plants.
Papito