Case fan above CPU keeps rattling, even when replaced

Had my PC for a few years now, about 12-18 months after building it I noticed the case can (arctic 140mm) above the CPU was making a lot of noise. It’s a rattling sound that almost seems like the fan itself is nicking some part of the fan housing as it spins. Not saying that’s exactly what’s happening, just sounds like it. If I pull up on the fan’s housing a bit when it’s running and installed in the case, the rattling stops. I even used a toothpick as a lever to keep the housing raised for awhile - which as a band aid, did work. Eventually I just replaced the fan with another one and then about a year later it started making the same sound. Replaced that, a few months later it started making the same sound. Replaced that, two days later it starts rattling.

It’s the only fan in the entire case that’s ever made this sound. What is causing this to happen and how can I solve it more permanently? Obviously it’s just not the fans causing this but I have no real clue.

Using a HYTE Y60 case if that’s relevant.