On Saturday, November 2, 2019 at 12:16:46 PM UTC-4, Jim Horton wrote:

The main drawback with the device is having to use the wet filters and
it takes them a good twelve hours to dry and that's under a ceiling fan.
Don't want to trade filtered air for mold!

If you are using synthetic sponges for the filters, add a tablespoon of bleach to a pint of water - no mold.

Or, isopropyl alcohol - anything over about 6% will inhibit mold as well. You may use alcohol on natural (cellulose) fiber sponges.

Peter Wieck
Melrose Park, PA