[Festus2]

sourdough -
Why not pick up a small, cheap portable fan and run it during and long after showering. Mold, mildew, algae love both heat and moisture and by moving the air around you can reduce or eliminate the amount of moisture. This, in addition to your overhead exhaust fan, should help to reduce the chances of the yucky stuff growing on the shower walls and help make your bed sheets feel a bit drier.