Hi I am a private tenant and the landlord has wallpapered every ceiling including the bathroom. Unfortunately he's used the same wallpaper as is in our bedroom so it seems to be attracting these mould spore marks. Bathroom is well ventilated, we always have window open and extractor fan on so I think it must be the wallpaper used. I've tried wiping them off which looks slightly better but seems to smudge it instead. Is there anything else I can do? Also in my daughter's bedroom the ceiling wallpaper is coming down! I've emailed letting agency and they said they'll put a note in our file but maintenance man off for a couple of weeks (this was a couple of weeks ago) would you just try double sided sticky tape? Thanks 