I can always tell when I need to replace the filters in my clean indoor air system because I will have to dust my furniture more often. I have also noticed that every time I go into someone’s home, it seems to be so much cleaner than mine and it is because they stay on top of those hidden things that I don’t always think about. It does occur to me, though, that the dust on my furniture was at one time in the air meaning we have been breathing that mess.

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