1. Identify the source

The first step is to identify the source of the moisture and fix it. This may involve repairing leaks, improving ventilation, or installing dehumidifiers.

2. Remove the mould

To remove the mould, begin by scrubbing the affected area with a solution of water and detergent. This will help to loosen the mould and kill any remaining spores. After scrubbing, use a damp cloth to wipe away the mould and any remaining debris.

3. Repeat step 2

Wait until the washed area has fully dried and repeat step 2, do this even if the treated area looks clean and remember to use a clean, disposable cloth or paper towel. 

4. Prevent it from returning

Once the mould has been removed, it is important to prevent it from returning. This can be done by controlling moisture levels in the home and regularly cleaning and maintaining the affected area. Be sure to check for leaks and other sources of moisture regularly, and fix any problems as soon as they are discovered.