can anybody give me some tips on keeping my 2 bed ground floor flat mould free, mainly around the bottoms of outside walls where the windows are, have a dehumidifier on most of the night in the small passage, and wardrobe is pulled away from wall so air can serculate and flat is quit warm no air bricks as the free holder want £250 for permission to put in to installe them would be about £150 by our builder, only need 3, any ideas thanks