What do you do about an overgrowth of Aspergellus Fumigatus?

This is a tricky one.

You may wish to start by eliminating exposure to anything scented (candles, lotions, perfumes, scents, cleaning products high in perfume, shampoos titled with "perfume") or try and replace items where possible with more natural-based.

A diet very low in refined sugars and carbohydrates can also help here.