The squirrel-proof feeder market runs on a fantasy: that this time, this design, this cage or spinner or weight-triggered mechanism, will finally defeat the squirrel. It will not. Squirrels are full-time professionals with nothing to do but solve your feeder, and you are an amateur who checks it twice a day. The honest move is to stop fighting a war you cannot win and switch to a strategy of redirection.
Why the arms race is unwinnable
Every "squirrel-proof" mechanism is a puzzle, and squirrels are extraordinary puzzle-solvers with enormous motivation, perfect persistence, and an athleticism that makes most barriers temporary. You buy the clever feeder, enjoy a week of peace, and then watch the squirrel defeat it in a way the designers never imagined. The escalation never ends, and each round costs you money and patience.
The cheap strategy that works
Put a dedicated squirrel feeder — loaded with cheap corn or the like — some distance from your bird feeders, ideally lower and easier to reach. Squirrels are efficient; given an easy meal, many will take it over the harder bird feeder. Pair that with simple placement sense for the bird feeders — well away from launch points like fences and branches — and a baffle on the pole, and you have spent less and suffered less than one fancy squirrel-proof feeder would have cost.
The mindset shift
This is partly a hobby about peace. Declaring war on squirrels turns your garden into a battlefield you patrol with resentment. Feeding them on purpose, a little distance away, turns them from enemies into just another animal at the table. Give up the fight, feed everyone, and enjoy the birds you set out to watch.