Q: My brother bathed in a tub of water after urinating without doing istinja. Will the things he touches become impure? What if we cannot see, taste, smell the impurity, do we have to clean that object?
A: If he touches with a dry hand it will not become impure.
And Allah Ta’ala (الله تعالى) knows best.
Mufti Ebrahim Salejee (Isipingo Beach)