(Sorry, this is long, just wanted to give all the info I think is relevant).
I feel like our flat is a constant battle against black mould. Is there a way to stop it for good?? We live in a flat with double glazing but no gas central heating and have electric heaters in bedroom and living room which we use to keep the flat at a nice temperature (it’s not a big flat). We have a dehumidifier which we put on for several hours over night and often for a bit when we go to work. When we’re in on weekends and it’s not raining I make sure to open the windows for as long as possible each day, on weekdays I try to remember to open the bedroom windows slightly while we get dressed as those windows are always absolutely soaking every morning and the windowsill below and walls around get mouldy. We both shower/bath in the evening and we open the window slightly while we do and use the dehumidifier afterwards. We always put the extractor fan on while cooking. But there is still mould! It’s around the bathroom windows, bedroom windows, front door, just found some in the corner of the living room which until now I had thought was a nice dry room. We clean it up regularly with mould remover and because we do it often it does come off quite nicely but just comes back so quickly and I can’t think what else we can do.
We do dry our washing inside because we don’t have any outside space or a tumble dryer (and this won’t change unless we move so there is nothing we can do about this) but there are just two of us so not piles and piles of laundry, normally two colour loads and a small white wash per week (also the area where we put the clothes rack is actually totally mould free). We live on the ground floor so I don’t want to leave any windows open at night or when we’re not here.
I know that once you have mould in one place it’s likely to come back unless professionally removed but I don’t understand why new mould is appearing. Am I missing something really obvious, or are some houses just mould prone? Is there anything we can do to slow the growth and prevent new spots?