Like others, I started losing airflow after about 6 months. The fan grills are large, dust does not accumulate. And on the blades it was a little visible. dismantled. 2 screws and you need to unscrew the side handles and pull them out of the stand. There was still no airflow. Strange. I cleaned the blades. No airflow. Then I removed the blades. It's just a friction fit. So the strong train made it. After pushing it back in, I had airflow again! When I took it apart, I noticed that the blade wobbled a bit. It's still not much, but my really powerful airflow is back! Now I'm going back to sleep. Much luck. mmv.
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