Also, why would the manufacturer choose to make this item using cotton?
Try washing your hair an hour or two before you go to bed put it up in a pony tail so it doesn't get tangled. Then take it out in the morning style. (chances are it will still be a little damp from showering the night before.)
Enough water will wash the acid away. They sell commercial grade concrete cleaners at hardware stores. Wear gloves safety glasses and protective clothing this cleaner is as toxic as battery acid.
