It is greatly saved with two birds with one stone as it flies with air while sweeping with brush rather than flying dust alone. We also devised a method of attaching detergent to the end of the brush, whisking with brush, floating the dirt and then blowing it with air. Depending on how it is used it can be three stone birds.
I think that the idea is pretty good but the weakness of the hair and the hair ends immediately. Just because it was air-blowing after rusting off dust and dirt beforehand, time has been reduced. I would like manufacturers to hope to make improved version with strong back hair like raster pig hair if possible.