<<I changed the filter about 7-10 days ago (I use EnergyAire MERV 7
filter from WalMart)>>
EnergyAire filters are designed to be energy-efficient, low-restriction
filters and don't do a very good job of removing mold spores from the
air. I would suggest using filters with a higher MERV rating. The
higher the rating, the better it filters the air.
I would suggest either the 3M Filtrete Ultra Allergen Reduction Filter
(MERV 11), a Lysol Elite Filter (MERV 12), or an Accumulair Diamond
filter (MERV 12).
Look at the Filters-now website for more information. Here's the link:
If that link doesn't work with your browser, type filters-now.com in a
search engine and you should be able to find it.
I hope this helps.