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://reidqydhm.shoutmyblog.com/33826901/o-maior-guia-para-top-3-automatic-vacuum-cleaners