My early business almost died due to squirrels pilfering the fruit of my customers. There was little useful info at the time but I noticed some people around using duct pipe which I found difficult to work with so I ended up inventing this system (not that it wasn’t invented before by someone else- it’s not rocket science). The thing is the trees have to be trained high because the buggers will jump between 4 and 6.5’ depending on I don’t know what. It isn’t state of hunger or anything in the appearance of the more athletic squirrels. Out of over a hundred sites only a couple I manage have or had squirrels with that kind of Olympic ability.
Those things your parent used probably only work when the squirrels have limited interest in the first place… never worked here.
Don’t mix Captan with oil.