Locate the air purifier's filter. Many times this is located underneath and toward the back of the air purifier. Note where it came from and what direction it was placed in the air purifier.
Carefully pull out the filter. Place disposable filters in a plastic bag and take them to a store for comparison and find the exact replacement filter. If it's a reusable filter, clean gently with warm water and mild soap. Rinse thoroughly until all suds are out of the filter. Shake out the filter to remove any excess water. Set the air purifier's filter aside when finished.
Disassemble the air purifier as much as possible. Make sure you keep track of what you are doing so that putting it back together is easier. You may want to take notes for easier assembly later.
Use a damp cloth wet with warm water to wipe down the entire purifier and all its parts. Wipe out all the grooves really well.
Leave all the air purifier's parts on a clean surface to dry completely. This may take several hours, depending on the consistency of the filter.
Reassemble your air purifier once it is dry. It is now clean and should be working properly.
- Once you reassemble your air purifier, if it is still not working remove the filter and let it dry a little longer. You can also use a blow dryer set on low heat to dry the filter.