I first check the room area for dust build-up, then I take the extension hose for the sweeper and attach it to the sweeper, then I proceed to sweep the ceiling first because I have an allergy to dust, it takes about 5 minutes to 15 minutes to sweep the ceiling, then double check that it is clean or close enough, you do not want an allergy attack overnight while you sleep, it is so hard to breath when your nose is full, the next step is a headache, then it is medicine time, then you have a bad night's sleep.
If you can check, you will be able to see that if you have any bookshelves you might…