I say, and with God's success: The prescribed manner of wiping over the socks is that the wiping should be done with the fingers spread apart, starting from the tips of the toes to the shin on the surface of the socks. This is the description of the proper wiping. Refer to: Al-Wiqayah and its explanation, p. 114, and Al-Hadiyyah Al-Alaiyyah, p. 41, and God knows best.