You can remove mould from your curtains with salt water?

For mildew on curtains, carefully take them down and soak in a bucket of warm water in which you have dissolved 1kg of salt (not iodised). Soak overnight and then hang on the clothes line in the sun so that the creases fall out (do not rinse). The salt will dry and crystallise then brush off and the mould will come with it.

Check for colourfastness of  your curtain fabric and do a spot test if you are unsure. I’ve used this method on net curtains with great success. Before you re hang the curtains spray the underside (not the side that faces into the room) with Mould Magic.