I throw in Cheerios or popcorn to see if they know to vacuum that up rather than avoid it. I also run them over oatmeal and flour to see how well they pick up fine debris and have them tackle both thick and low-pile carpets. I watch to see how https://iowa-bookmarks.com/story15263296/n%C3%A3o-conhecido-declara%C3%A7%C3%B5es-factuais-cerca-de-top-3-automatic-vacuum-cleaners