The ruling on placing cloth on the head and wiping over it in wudu'

Question:
He says: Honorable Shaykh, may Allah grant you success. A woman says: Some women place a piece of cloth or something else on their heads after they have styled their hair with a blow dryer, and then when they perform wudu', they wipe over the cloth and do not wipe over their hair.

Answer:
It is permissible, but wiping over the cloth does not suffice. It does not suffice. One must wipe directly over the hair. Yes.