A pattern across rooms needs appropriate assessment.
Condensation, a leak or water entering a building can be relevant, and more than one issue may be present. Explain recent changes and previous repairs. Widespread, recurring or suspected concealed mould needs appropriate professional assessment rather than repeatedly wiping the visible marks. Surface removal alone may leave the reason for moisture unresolved.
Keep any existing findings from a landlord, plumber or other professional available. They help explain what has already been considered, but a previous repair should not be assumed to have resolved every area now reported.