HEPA filters are very powerful when it comes to the different types of air filters. HEPA stands for high-efficiency particulate air, which means that they pull in very small microbes very thoroughly. They are usually used in hospitals and clean rooms to keep the germs out of the air.
It filters these small bacteria and viruses, destroying them on the way through with the powerful technology they are created with. They are made with many tiny fibers that are folded together, making it very easy to keep and kill these organic microbes.
You can find ways to clean these HEPA filters at http://www.damagecontrol-911.com. Every couple of months, you will want to take the HEPA filter out of the air purifier and either wash it or vacuum it. Make sure that they are washable first, however. Washing an unwashable air filter can destroy it to the point of needing a new one.
However, they can all be vacuumed and wiped down, so simply take it out of the machine it is in and vacuum it off. Even if it is a permanent HEPA filter, you can vacuum it easily. It is the recommended way, so you don’t have to worry about it too much. Never let HEPA filters go for more than three months without being cleaned because it will lose efficiency.