Wash bedding every 2 weeks in hot water. Polyester, not foam or feather pillows. Plastic cases on mattresses and pillow to keep dander out. No upholstered chairs, throw rugs, etc. Clear out bookcases and shelves.
Blinds are preferable to curtains or drapes.
Face masks during housecleaning. Avoid oscillating or ceiling fans that stir up dust. Cold fronts coming in over rice paddies north of Houston bring spores. Rain may clean air, but growth surges in the humidity which follows. Will have little effect on nasal congestion but may have drying effect.