Rain. Heat. More rain.
Typical British summer. We’re not ready for it. Our homes definitely aren’t either.
Here is the thing nobody talks about: summer mould.
We think mould is a winter problem. A cold, damp ghost. But the fungus doesn’t care about the calendar. It just wants moisture. Warmth. A place to hide.
“Mould is a naturally occurring fungus that’s always present in the air. It only becomes visible when it finds the fix conditions: moisture, warmth and a suitably damp surface.”
— Emma Mannion, cleaning expert
Right now, the humidity is high. You might think opening the window helps.
It might actually hurt.
On hot, humid days, pulling that air inside brings the problem with it. Poor airflow? That’s an invitation. Cooking, showering, drying clothes inside—everything adds water vapor. The air gets saturated. Then it hits a cold window overnight. Splat. Condensation. And soon, black spots.
Electric dehumidifiers solve this. Obviously.
They’re bulky. Loud. Expensive.
I found a loophole.
Amazon sells disposable dehydro boxes for roughly £10 for a ten-pack. They are unassuming cardboard bricks. Inside are hydrophilic crystals. They pull water from the air. Up to three times their own weight.
You peel the foil. You place it down. You forget it exists.
A few years back, living in university halls, my clothes started smelling like wet wool. I shoved one of these boxes in the wardrobe.
The smell vanished.
The box filled with water rapidly. I was horrified. And delighted.
Now? I have one everywhere.
Kitchen window sill. Bedroom corner. Tucked behind plant pots. Under the sofa. Behind the bookshelves.
They’re cheap enough that I don’t think twice. £9.99 is a lot for plastic bricks until you consider the alternative: scrubbing spores off your ceiling at 2 AM.
Do they cure an active infestation?
No.
“If you have an existing mould issue. A dehumidifier alone won’t fix the underlying cause.”
— Andy Ellis, founder of VidalUX
Big rooms need big machines. Bad ventilation needs fans.
But as prevention? As a way to dry out the pockets of stale, wet air before mould gets its start?
It’s brilliant.
I swap them out once a month. Or sooner, if I live near a bog.
Which room is the driest in your house?
Remove Existing Mould
If you’ve missed the prevention window. If the spots are already there.
These products actually work on the fungus itself. Not just the humidity.
