Never gone thru it with an inline, but for the oscillators and grilled fans I take a less classy DopeDaniel approach. I use a shop vac and canned air to clear dust from the blades. I also yam a chopstick through the grill to keep the fan blades from free spinning. Don't know if it's necessary for fans this large, but I always secure fan blades before hitting them with canned/compressed air as a carry over from my IT days. Smaller (case and cpu/gpu heatsink size) fans can be accelerated past normal rpms and damage coils/windings, or if you're really unlucky, generate enough current to pop a small diode in a remote unseen corner of your mobo. Like I said, don't know if anything in an oscillating fan is that sensitive, but the fancy oscillating fans these days with 20 speed and movement settings have circuitry in there somewhere.