After anointing Jesus' feet at Bethany in John 12, what did Mary wipe them with?

Answer: Her hair

Mary anointed Jesus' feet with pure nard and wiped them with her hair, and the house filled with the fragrance.

“Then Mary took about a pint of expensive perfume, made of pure nard, and she anointed Jesus’ feet and wiped them with her hair. And the house was filled with the fragrance of the perfume.”— John 12:3 (BSB)