Exfoliating with salt of baking soda would still help you. Removing it manually each day, will result in less dandruff than if you allow it to slowly flake off.
But I agree with others, that massaging your scalp with something antifugal would help. Maybe some liquid grapefruit seed extract? Perhaps a grapefruit seed extract and baking soda combo would work. I don't think the baking soda would dissolve in the grapefruit seed extract,(which you don't want it to do, so you can get the scrubbing action) but the combo should rinse away easily with water.