Yes, plug-in ionizers do work to clean the air, but it’s important to understand how they work and what their limits are.
Ionic air purifiers, also known as ionizers or negative ion generators, work by releasing negatively-charged ions into the air. These negative ions attach to pollutants, like dust and allergens, making them too heavy to stay in the air. Once they fall to the ground, you can easily sweep or vacuum them up.
However, not all air pollutants are heavy enough to be dropped by negative ions. This means plug-in ionizers might not work as well on some kinds of air pollution, like smoke or certain kinds of chemical fumes.