Repairing a Cat Mate C500 automatic pet feeder

We have one of these: Cat Mate C500 automatic pet feeder

It started going into an infinite spin. (Which drove Enid a bit mad!)

Thanks to this very helpful video Fixing Cat Mate / Closer Pets Automatic Feeder (Infinite Spinning), I learned that usually all you need to do is clean the sensor.

I did, and it worked fine again.

Handy tip also about holding ADJ + UP to make it spin to test it, and to realign it if it's gotten misaligned.