Is it permissible to clean ones clothes at the dry-cleaners?
Answer:
According to our understanding, commercial dry cleaners use one washing chemical for many washes. The chemical is not changed after every wash.
If an impure garment is put in such a lot, it will not become pure. In fact, the other clothes in the same lot will become impure.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai