Mind that stuff doesn't get inside the fan bearings though, you don't want it stripping out the oil or grease from them!

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Team AnandTech - SETI@H, DPAD, F@H, MW@H, A@H, LHC, POGS, R@H, Einstein@H, DHEP, WCG

Main rig - Ryzen 5 3600, MSI B450 G.Pro C. AC, RTX 3060Ti 8GB, 32GB DDR4 3200, Win 10 64bit
2nd rig - i7 4930k @4.1 GHz, HD 7870 XT 3GB(DS), 16GB DDR3 1866, Win7

Mind that stuff doesn't get inside the fan bearings though, you don't want it stripping out the oil or grease from them!

Lately I have been buying better fans that have better bearings in them, most are the really cheap ones that seem to just run with little to no grease though.