Identify the moisture source first
The U.S. Environmental Protection Agency organizes indoor air quality steps around source control, adequate ventilation, and supplemental air cleaning or filtration.
Improve ventilation before adding equipment
The EPA also says moisture control is important. The agency advises keeping indoor humidity below 60 percent and says 30 to 50 percent is the ideal range.
Track indoor humidity over time
For a laundry area, those principles support checking where moisture originates and whether air can leave the room before assuming that surface cleaning alone will solve the problem. A humidity reading is useful as a condition check, but the official source does not diagnose a building defect from one reading.
Know when cleaning is not the solution
The source does not identify the cause of moisture in a particular home. It does not confirm that a specific appliance, vent, dehumidifier, cleaner, or filter will correct an individual problem. Persistent leaks, visible damage, electrical concerns, combustion concerns, or suspected mold may require qualified local inspection.