Which preposition to use with cowlick

from Occurrences 1%

"What shall we do with him, Top?" The person addressed swung back the rebellious cowlick from his forehead, as if to clear his thinking faculties from a load while he considered the grave question.

on Occurrences 1%

" Dickie deliberately smoothed down the cowlick on his head.

Which preposition to use with  cowlick