One tip we left off this list is to buy an air purifier. Air purifiers are pieces of equipment that claim to sanitize the air, some by trapping particles in filters, others by neutralizing particles as air flows through. While they can work to some degree, research indicates they won't do enough to get rid of particles in your home that are trapped on soft surfaces or on your walls. For that reason, we consider the other tips in this guide to be better uses of your time and resources.