i just did it today for the second time, it has been almost 6mos since the first time. it took me only 18mins to do it.

1. i only unscrewed the left gold screw to get the metal bar to lower and

2. to get the black filter cover off, do not pry down with a screw driver, just lift up and forward from the bottom, it just snaps in place.

this is a really easy DIY.