Act early:

1. Ventilate more – especially the room where mould appears.

2. Clean the affected area with appropriate cleaning products (there are specific anti-mould sprays in supermarkets and drugstores).

3. Move furniture slightly away from the wall if mould is behind it.

4. Check your habits – drying clothes, closed windows, lack of heating.

If:

• the mould comes back quickly,

• spreads despite better ventilation, or

• seems to be connected to a leak (wet patches, peeling paint, dripping),

then:

• take clear photos,

• inform the landlord in writing,

• describe since when you noticed it and what you already tried.

Early information makes it easier to find the real cause.