Since many authorities permit wiping the hands if one does not have water to wash with (when washing for bread), is one forbidden to wipe their hands on Tisha b'Av?
One may dry his hands on a towel and then use the damp towel to clean his eyes and face, as the towel isn’t wet enough to impart enough water to wet something else (tofach al menat le-hatpiach) (Shulchan Arukh 554:11). (If one must actually clean one’s eyes in the morning, it is permitted to do so normally, as it is no different than washing any other part of the body which has become soiled.) Furthermore, the Rama (ibid. 14) writes that one may pre-soak cloths before Tisha Be-av, remove them, and then use them to clean his face, hands, and feet. Even if one’s intention is for pleasure, this is permitted because he already squeezed the water out of the cloths.
The text in bold implies that one may wipe one’s hands on Tisha b'Av.