I never found the recommended cleaner. Advanced FYI: I’m out of warranty and we are used to working with delicate machinery and circuits in my house.
I had my husband remove the fan (everything was unplugged of course) and I cleaned it, and I also cleaned the opening in the back, because if that’s blocked, that’s not good either. Then I had my husband put the fan back in. I read somewhere that a user 3D printed an alignment tool to get the bottom right screw back in, but my husband did it without any issue. You do need a hex tool with a round top for this to work. We did not remove the glass cover.
I would not recommend this method unless you have complete faith in your ability to take things apart without breaking them (the cables especially). Posting the link that talked about the 3D printed alignment stuff.