I think it is window cleaner.
a window cleaner
A janitor or maid
dry-cleaner
Safai wala.
A neat freak!
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a janitor.
If the person was female, she would be called a maid.
Detailer may be the one you're thinking of.
Generically a "domestic aid" For a female a "chambermaid" For a male a "houseman"
A window cleaner
A window viper would be the your answer !