Hawzah News Agency – Something comes in contact with an extrinsically najis object. Does it become najis? And if it becomes najis, does it make anything else najis? What about the subsequent things in this chain?

Answer: The object, which contacts an intrinsically najis material and becomes najis, makes another thing najis if they come into contact with each other when one of the two is wet. The latter makes, by obligatory caution, another thing najis on contact. However, this third extrinsically najis object does not make anything najis.

Source: https://www.leader.ir/en/book/32/Practical-Laws-of-Islam