Mould can resemble spots. It comes in a variety of colours and has a musty odour. Mould should be removed if you see or smell it. You don't need to know what kind of mould you're dealing with.
If mould is growing in your home, you must clean it up as well as address the moisture issue. Household products, soap & water, or a bleach solution of no more than 1 cup of household laundry bleach in 1 gallon of water can be used to remove mould from hard surfaces.
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Keep the humidity in your home as low as possible—no more than 50%—during the day. You can reduce the humidity by using an air conditioner or a dehumidifier. A meter to check the humidity in your home can be purchased at a home improvement store. Because humidity levels fluctuate throughout the day, you'll need to check the humidity levels more than once.
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Make sure your home's airflow is unrestricted. In the kitchen and bathroom, use exhaust fans that vent outside your home. Ensure that your clothes dryer vents are located outside of your home.
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Fix any leaks in your home's roof, walls, or plumbing to prevent mould from growing.
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Dry wet areas immediately.
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Invest in mould-resistant products for your home.
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Mould-killing products should be used in bathrooms.
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Carpets and upholstery that have been soaked and cannot be dried immediately should be removed or replaced. Consider not using carpets in areas with a lot of moisture, such as bathrooms or basements.