Cats love to stroll along kitchen counters because they are human-high and often contain tasty or at least interesting things. People have tried many methods to stop them, but all cats are different, so nothing works consistently. I have one cat who roams the counter, leaving evidence that she scratches herself with my cactus garden. I cope by putting dirty dishes away quickly and not leaving uncovered food out. And cleaning the counter often. She has me trained.
Cookie is a hard case, though. He roamed the whole kitchen and was not susceptible to human tricks. The guy behind the YouTube channel Lab-X is an engineer, so he built an AI-assisted robot with a squirt gun built in, and trained it to recognize Cookie and deter him. He named it Puffy. There were plenty of tests and failures and tweaks to be made before it actually worked. If you don't care about the tech stuff, you'll still get a kick out of Cookie's antics. My cat would spot the robot and knock him off the counter immediately.
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