DD has had a stuffy nose and congestion so we've been using the humidifier for about 4 or 5 nights over the last week. Every morning I've been wiping down her windows and leaving them both open for the whole day but the roof has been getting mould looking marks. DH wiped them and they cleaned off really easily and he's going to scrub it with sugar soap and paint with microbacterial (?) paint. So that's fine. But I also noticed a couple of other things:

1. The curtains had tiny black spots which I assume are mould. They are just cotton light curtains so I took them off and washed them with canestan and disinfectant and dried them in the sun all day. Now they are slightly faded but no big deal BUT the black spots are still there. They aren't noticeable unless you are up really close and looking but still...........does this mean they still aren't clean?

2. I changed DD's sheets and mattress protector this morning (I've been doing this every couple of days since she's been sick) and noticed about 5 or 6 tiny black dots on the mattress too. OMG! What do you think I can do about this? Just put the mattress out in the sun for a little while? They are really small, probably about the size of a pinhead or smaller but still.............

If anyone has solved these issues or has any ideas, that would be awesome.

Thanks in advance.