Seven months ago, CSHAEDLER wrote a post about using alfalfa in the bath water. It doesn't seem to have caught on, but I never heard one negative word about it.
I've also wondered about ozonators because they would encourage oxygenation. I don't know how that would effect electronics or plumbing, etc. I know they are approved safe for restaurants (supposedly). If you do use one, turn OFF the gas and pilot lights to the stove and boiler, ozone is oxygen 3 (O3) and flammable.
I've heard that the morgellons organisms hate salt, so maybe spray brine (salt and water solution) is best for daily use around the house (used sparingly, it also would cause corrosion and be harsh to breath the vapor).
Cayenne pepper is very strong and useful in erradicating germs. I never heard it used for Morgellons. If the fibers are nanotech, they are inanimate and cayenne might not have an effect on them, if they are animate (botfly larvae), then cayenne would wipe them out.
Cayenne has also been used in baths, is very powerful ( Dr. Schulze 's #1 herb) and purifies the blood.