We live in a 1960's house and untill now no issues at all, last winter we had a couple of patches of mould turn up between our wardrobe and the exterior wall. Once I noticed it I pulled the wardrobe about 25cm away from the wall and since then it's been okay. But today while cleaning the windows I looked down and noticed this! I'm horrified we share our bedroom with my 1 year old daughter. What do I do?