Cleaner (noun)

1. A person or thing that cleans.
2. A person whose job is to clean a building, vehicle, or other area.
3. A substance used for cleaning.

Origin:

Late 16th century: from clean + -er.

Examples:

1. The cleaner came to clean the office.
2. The windows were cleaned by the cleaner.
3. She hired a cleaner to clean her house.
4. The cleaner is responsible for keeping the building clean.
5. He used a special cleaner to remove the stain.