I recently bought MasterFan MF120R ARGB
They worked perfectly for a few weeks
but recently one of the fans started making noise when starting up or shutting down PC.
I went to have a look
it seems the fan is struggling to spin.
I tried spinning the fans of the other 2 but they spin perfectly fine with ease and slowly stop.
This noisy one on the other hand has something preventing it from spinning easily.
It gets harder to spin when I face the fan upwards, where the CoolerMaster logo is facing
or when I face it sideways.
It spins a bit fine when its facing downwards. So I installed the fan that way instead so it doesn't make noise when running.
Though it bothers me that it will die first because of what ever is making it hard to spin inside.
I removed both sides of the stickers, no screws or anything to remove the fan
the back has a hole showing the pcb and has a round plastic hole in the middle, though I don't think its removable and is just part of the back cover.
Are there any tutorials or photos on how to disassemble this type of fan?
I haven't seen one yet, I've been searching.