I live in a basement flat with no central heating.
Over the last few months I have noticed that when I'm doing the housework there is a film of mould stuff on things like wooden bookselves, leather and upholstery.
It cleans off, but reappears over the following weeks. I use covector heaters to heat the flat, but at this time of year they are not in use much!!
Help, any suggestions welcome on how to prevent this!!