You might not ever think of this as a mold generator, but the laundry room could be a problem! An un-vented or improperly vented clothes dryer is a virtual incubator for mold – since it’s moist and very warm — an ideal environment for mold to grow!
Where does your clothes dryer vent to? Are there holes in the duct? Are there many bends in the duct restricting airflow? Check your dryer vent it, if it is a problem it is probably the easy to correct.