čistač

1. (of a person) cleaner
   Čistač dolazi svako veče posle radnog vremena. — The cleaner comes every evening after hours.
   Nekada je na uglu radio čistač cipela. — There used to be a shoeshiner on the corner.
2. (of a device or product) cleaner
   Kupila sam novi čistač za tepihe. — I bought a new carpet cleaner.

A cleaning lady is čistačica; car windshield wipers are brisači, not čistači.