Make sure to leave some space between your furniture and walls, even a small gap helps air circulation—a simple step that can make all the difference.

If the air remains constantly humid despite these measures, consider using a moisture absorber or an electric dehumidifier. These devices work wonders, especially in small spaces.

A practical tip: during winter, briefly open your windows in the morning and evening to eliminate accumulated overnight condensation.

For an extra benefit, add a few drops of tea tree essential oil to your cleaning solution. Its fresh scent comes with well-known antifungal properties.

How to prevent recurrences for good (so you don’t start over every month)
After cleaning your walls, prevention becomes your best ally. The goal: to treat the problem at its source.

If your ventilation system is insufficient, consider installing a mechanical ventilation system (VMC) or improving air extraction. Good ventilation solves many problems.

Regularly monitor indoor humidity levels with a hygrometer, an inexpensive but very useful device. The ideal level is between 40% and 60%.

For walls sensitive to moisture, special anti-humidity paints provide significant extra protection.

If you suspect infiltration or insulation defects, don’t hesitate to consult a professional. An expert can precisely identify the source of the problem. What appears on the surface may only be part of the real issue.

Absolutely avoid: painting over mold directly. This temporary fix only delays the inevitable. Also avoid gas-powered portable heaters without proper ventilation as they produce water vapor and worsen the problem.

What to do if stains persist anyway?
If marks keep coming back, it signals a deeper structural problem.

In this case, carefully inspect your roof, exterior walls, and water drainage system. Faulty insulation or invisible leaks may be to blame.

For rising damp, several solutions exist: resin injection into walls to block moisture or anti-saltpetre treatments if your walls show crumbling or white deposits.

Hiring a qualified RGE professional or a specialist in humidity issues can save you many long-term headaches. A thorough diagnosis will identify the cause and allow proper solutions.

If you are a tenant, report the problem immediately to your landlord. Mold can cause health problems and needs quick treatment.

You now have all the keys to effectively fight these unwanted stains. With increased vigilance and the right methods, you can restore healthy walls and a calmer atmosphere in your home.