How many times can Najasat be transmitte?

Salam u Aleykum I´ve heard that it is held by some scholars, that a thing which has become najis transmits its najasat, but indefinite number of transmissions is improbable. For example, if the right hand of a person becomes najis with urine, and then, while still wet, it touches his left hand, the left hand will also become najis. Now, if the left hand after having dried up, touches a wet cloth, that cloth will also become najis, but, if that cloth touches another wet thing, this thing will not become najis. My question now is whether this is right or wrong according to the hanafi-school.