I do major cleaning plus decluttering for one and only reason: when I miss something. Then I start digging up in a random place, discover a pocket universe of aggregated things among three volumes of Mikael Niemi's books or behind a tome on Italian Baroque art, I bring a washcloth to wipe the dust, and to wipe the dust, I take out the books from the whole shelf segment, finding more things between, in and behind the books... you see where it goes.
The missed objects were remote for the vacuum cleaner and scissors. Said remote was located under a small pile that contained a hank of yarn, an old magazine, folded silk scarf and a bottle of nail paint. Hank of yarn sits on a chair along with 20-odd others, pulled from the crrevices and abysses of the small bookcase, old mag was tossed, silk scarf was added to a goodie bag for a friend and the nail paint is sitting somewhere around.
The small bookcase, though... It contained a heap of perfumes. I totally need a special cupboard for my collection because they deserve a decent storage. Meantime, they're located in a sturdy box that contained the stovetop; it's big, flat and sturdy. I don't really know how many perfumes I have, it's not worth the bothering. Hundreds. I found some of whose existence I forgot and I noticed that I'm missing a few, which practically means that they live in some other parallel universe; no biggie.
I also randomly opened a book and a banknote fell to my feet. Maybe I'll be rich at the end of the day.