Q: What if some dirty thing in the form of liquid makes your shoe dirty, can we clean it by rubbing it on the ground?
A: Yes, provided the filth has disappeared. If the wetness of the filth still remains then the shoe will not be considered as paak.
And Allah Ta’ala (الله تعالى) knows best.
Mufti Ebrahim Salejee (Isipingo Beach)