My mom is currently cleaning up our house.
She had to stop the vacuum cleaner and look inside the tank.
She had observed that there was a lot of dust in there. She had never seen so much dust in the vacuum in her life… Our household has never been this dusty before. I had mentioned to her that it could be from the Heating and Air Conditioning air ducts behind our walls. I did mention that the air ducts tend to build up a lot of dust inside of them, when I told her that she laughed at me. She did not think that there was anyway all of that dust could come from the air ducts behind the walls. She absolutely thought I was being absurd. However when I told her to just make an appointment to get the air ducts cleaned she changed her mind. She saw when the men came over to scrub the air ducts. She saw all the dust that was building up inside of the air ducts. She could not believe all the dust that was inside of there. When she took a minute to stop and think about it she remembered that it had been awhile since she had the air ducts cleaned. She turned to me and apologized for laughing at me earlier. It turns out that I was right. The air ducts were so completely dusty that it was pushing all of the dust into our home! Next time when I tell her something maybe she will not laugh at me then.