Why Mould Keeps Coming Back in Your Bedroom (And How to Stop It)

If you've scrubbed off mould in your bedroom more than once and it just keeps coming back, you're not alone. At Sterng, we see this issue regularly in homes across Singapore. The truth is, mould isn’t just a surface problem. It's a symptom of deeper issues in your room’s environment.

Why Mould Comes Back So Often in Singapore Homes

Living in Singapore means living with constant humidity. Most bedrooms don’t get much ventilation, especially if windows stay shut for aircon use. Combine that with trapped moisture from daily activities and you’ve got the perfect conditions for mould to thrive.

Here are the most common reasons it keeps returning:

• High humidity levels year-round

• Inadequate airflow, especially in corners or behind furniture

• Trapped moisture from activities like indoor drying or frequent aircon use

• Previous mould wasn't fully removed at the root

• Using the wrong cleaning products like vinegar or bleach, which only treats the surface

Case Example: What We Commonly See in Singapore Bedrooms

In many Singapore homes we inspect, it's common to find mould returning even after homeowners have wiped it off multiple times. It usually shows up around ceiling corners, behind beds, or near wardrobes where airflow is limited.

Most of the time, the root problem is a mix of high humidity, poor ventilation, and surface-level cleaning that doesn't eliminate the mould at its source. We often find furniture pushed tightly against walls, windows that stay closed for long periods, or signs of previous DIY attempts using household cleaners like vinegar or bleach.

Once we carry out a full mould remediation, followed by fogging to neutralise airborne spores, the recurrence usually stops. We will also guide clients on how to achieve better ventilation and lower indoor humidity levels for rooms and areas previously affected by mould. The results are long-lasting when the right maintenance steps are taken after the treatment.

Why Vinegar Doesn’t Work

Vinegar is often recommended online as a natural remedy for mould, but in many cases, it’s simply not effective enough. While it may kill some surface spores, it doesn’t penetrate porous materials like paint, wood, or drywall where mould roots can hide. On top of that, vinegar is acidic, and not all mould species respond well to acidic treatments.

At Sterng, we use a high-alkaline solution designed to break down mould at the root level. It not only kills surface spores but also neutralises the hidden ones that can trigger regrowth. It's safe for indoor use, non-toxic once applied, and far more effective for long-term results than any DIY cleaner on the shelf.

How to Permanently Solve Bedroom Mould

Here’s a checklist to actually keep mould from coming back:

• Identify the true moisture source

• Use a professionally applied alkaline-based solution to kill spores at the root

• Improve airflow with a fan

• Daily dehumidification 

• Keep furniture at least a few inches away from the walls

• Avoid drying clothes indoors in your bedroom

• Inspect your room regularly for early signs of mould regrowth

  
  

When to Call for Help

If the mould keeps coming back after two cleanings or starts spreading quickly, it’s no longer a surface issue. That means the roots are active and the moisture problem is unresolved. Trying to fix it yourself might give short-term relief but rarely solves it long-term.

Final Thoughts

Recurring mould isn’t just frustrating. It’s a sign that your bedroom environment needs attention. And in humid climates like Singapore, it’s something we’ve learned to solve permanently through experience.

If you're tired of dealing with the same mould spot over and over, Sterng offers free inspections across Singapore. Tap here to WhatsApp us and book your slot.