Get a de-humidifier, stick it in the laundry room (wherever you dry clothes).
We don't have trickle vents, but the windows themselves can be locked in a "cracked open" position.
You need air to circulate freely within the flat - keep doors open, crack the windows in rooms with water sources (humans, laundry etc) and/or use the de-humidifier in said rooms.
When we moved into our place the wall paper was, literally, hanging off the walls due to humidity - when peeled off the back of the paper was thick with mould.
The previous tenants had left the heating on all the time, never opened a window, had laundry drying in two rooms, and, helpfully, the plumbing was leaking in multiple locations.
I ripped out 99% of the old plumbing, broke open the windows (keys were long gone), bought a dehumidifier, and we installed a wood-burner this time last year which is basically the best thing ever (and the cats love it).
Get a de-humidifier, stick it in the laundry room (wherever you dry clothes).
We don't have trickle vents, but the windows themselves can be locked in a "cracked open" position.
You need air to circulate freely within the flat - keep doors open, crack the windows in rooms with water sources (humans, laundry etc) and/or use the de-humidifier in said rooms.
When we moved into our place the wall paper was, literally, hanging off the walls due to humidity - when peeled off the back of the paper was thick with mould.
The previous tenants had left the heating on all the time, never opened a window, had laundry drying in two rooms, and, helpfully, the plumbing was leaking in multiple locations.
I ripped out 99% of the old plumbing, broke open the windows (keys were long gone), bought a dehumidifier, and we installed a wood-burner this time last year which is basically the best thing ever (and the cats love it).