I owna honeywell commercial grade floor fan HV180. How do i clean it? I cnnot seem to get it apart.

The front wire grating has hooks all around the edge that latch onto the rear grating. You need at least two screwdrivers, blades or thin & stiff shims to pry half the hooks off. Do this by inserting your shims between the front and rear grates, on either side of a hook. Then, lever your shims such that the rear grate warps enough to free a hook and let it pass in front. (Note: this IS difficult; the first hook will not want to clear the rear grate. It helps to have an extra pair of hands, and/or another object to temporarily keep the first hook seperated. It may also be possible to start with three shims and clear two hooks in the beginning). Continue clearing the hooks in a consecutive fashion (they're progressively easier) until half of them are off, at which point the front grate should come off using a little muscle. A couple notes: if available, a plastic shim is preferable over a metal one because it shouldn't damage the nice finish as much (alternatively, wrap your shims in cloth). It is NOT necessary to remove the whole fan cage from the stand to do this. Expect the reverse process to be equivalently challenging. Please wear safety glasses in case your shim breaks or slips. Lastly, good luck if you try to lubricate the shaft. I've tried multiple substances, but day-long blowing continually dries out the lubricant.