Good grief, those things are a menace. I had one that refused to flatten until I left heavy books on it for days. It's all about the roll memory, just like David said. Once it relaxes, it usually stays put.

Max361's air blast idea can help a lot. Get a cheap shop air gun and rig it close to the spindle to really blow the chips clear. Make sure your coolant nozzle isn't blocked and is hitting the tool directly, not just splashing around. A stronger pump might fix it if everything else is set up right.

Been there with raccoons setting off the same motion light every single night. It drives you nuts and makes the system useless. I started setting longer delays on the back fence line after sunset because of them. Customizing for the actual animals on the property is the only way to get any peace. Your method makes total sense.