and all you have to do is wash away 30 minuets later, but the thing is it keeps coming back after a few months and you have to do it all over again, but you should of seen my windows thay was blacker than black with mould plus it was all over the doors,

HG Mould Spray effectively removes all black and brown stains caused by mould, fungus, moss and algae inside and outside. HG Mould Spray bleaches grey and black mould spots and green algae spots.
These unsightly black or brown marks are found on the silicon seal between the bath tub and edges of tiles, on the shower cubicles and on plaster. For cleaning tiled walls, (also suitable for marble) and grouting in the bathroom, toilet, kitchen, cellar, basement, sauna, garage, shed etc. It also cleans facades, balconies, plant boxes and garden ornaments but NOT wood.