For the investment of a couple of hours time I have a clean and quiet running stove hood fan. The settings used to offer high and low, now it only runs on high, and the bulbs I put in it a few years ago won't do high and low, just high, but they're LED vs the original halogen, so a lot less heat.
Putting it back together after cleaning was easier; the encrusted grease around the fan axle made removal difficult. I had to clean the stovetop of a lot of stuff dripped during the process, but my vintage kitchen now has a vintage vent fan that works without the racket. To quote the landscaping channel I watch on YouTube, "Not perfect, but better." Cleaning the filters isn't sufficient, I should have been getting up inside more often. (As with the refrigerator compressor - something I need to remember to do perhaps quarterly.)