My BoboVR F2 fan for the Meta Quest 2 VR headset stopped charging/working, and since it was only a couple months old BoboVR support team was great and sent me a replacement. My original F2 was the version that clipped into the facial interface. The replacement is the newer magnetically held on version.
Since I got the replacement, and the old one was broken, I took it apart.
So there you go with some photos so you don’t destroy the F2 fan unit should want to take it apart. I have not checked on the newer magnetic version of the F2 fan; I suspect disassembly may be similar.