Suddenly noticed white mould...

[MyNameForToday1980]

First a few weeks ago, down the back of a chest of drawers in our bedroom which backs against an exterior wall (which we have known to be damp in the past following a gutter leak). Quite a lot of mould. We treated it with M&M remover, ran the dehumidifier daily. No more mould.

Then today, two patches, one down the back of a living room sofa (on the fabric). The sofa backs onto an interior wall, no mold on the wall. Only minor spotting on the sofa. Also treated with M&M remover (I tell.myaelf I'd rather have a bleach stained back of sofa than mould).

And the third on the wooden slats under our bed, again very little, but definitely mould. Treated the same way.

What is going on?

I've bought two air purifiers and another two dehumidifiers... But it's so odd.

Is it simply that we've been indoors a lot more (lockdown, and we continue to work form home...breathing and shit), and our windows have been mainly closed (poor summer weather)?

Have you had any central heating on throughout the summer? Might be worth whacking it on more regularly to dry out the internal air.

Also pull out all your furniture a few inches to let air circulate more.

@Wintercoffee it's only come on very rarely (the thermostat is set to 17 overnight and 20 during the day, so it's probably been on three or four times this summer).

In fact, thinking about it, we've been doing all the wrong things:

Drying clothes in the house (due to poor weather).

Not opening windows (due to poor weather).

Cooking hot food (due to poor weather, usually we'd eat significantly more cold food over summer).

Breathing 24 hours a day (an exaggeration, but previously we'd be at work 9 hours a day during the week).

Plus it's a Victorian house, we have to keep an eye on damp in general (airing unused rooms etc.).

We're usually pretty good.with leaving a couple of inches between wall and furniture (old Victorian house...) But over time I guess we push it back to make space.

Get the windows open, the weather might be a bit rubbish but it's not cold.

Yah @userxx it's not that I've been put off by the weather, just that it hasn't felt necessary to open the windows. Turns out, it's totally necessary. I've created some kind of hermetically sealed mould cavern.

Yeah, it's necessary. I'm one of those odd ones who has the windows open for hours each day. When the boyfriend moved in he was moaning about how cold it was in the bedroom at night, I closed the windows and withiin less than a week I could see mould on the upvc window frames,

Duly noted...windows will be open from tomorrow morning.

I'm still going to keep the two new fancy air purifiers though, because who doesn't want pure air?

I like my air pure, so I'd definitely be keeping those little life savers.

We live in a Victorian house; I keep several windows open all day and a couple at night.

During the day I try to create a real flow-through of air (partly because we have dogs, partly to keep the air moving and partly because I can't abide a stuffy house).

In the winter I'll have the heating on a fair bit but I'll still open windows and doors - gotta have fresh air! I get pissed off because I feel like I'm paying to heat the air outside the house, but I'd rather do that than close the house up.