This post indicates we are not vacuuming long enough. It notes most people just give a quick pass and call it done. The suggested times run from slow as if cleaning your carpet to 15-20 seconds per Square foot! If you have a lot of carpet you might want to clear your day for that job. If you have 2K sq.ft of carpet that could take 11 hours!
I have a very dense plush carpet and most stuff sits on top but I do give it a deep cleaning slowly going over it in one direction then rotating 90 degrees and going over it again. I personally hate oak flooring so most of my home is wall to wall carpet - I know not cool by today's standards but I like it.
https://lifehacker.com/youre-probably-vacuuming-way-too-fast-1849429518
I have a very dense plush carpet and most stuff sits on top but I do give it a deep cleaning slowly going over it in one direction then rotating 90 degrees and going over it again. I personally hate oak flooring so most of my home is wall to wall carpet - I know not cool by today's standards but I like it.
https://lifehacker.com/youre-probably-vacuuming-way-too-fast-1849429518