Dried on Yoghurt on dry clean only curtains - is there anything I can do?

[TheDevilWearsPrimark]

I just noticed this morning that one of the DC appears to have been trying to clean the window with yoghurt. Theres an upended pot on the windowsill and smears of it on one of the curtains.

Is there anything I can do to get it off? I really can't be arsed to take them down and to the dry cleaner.

First gently remove as much of the dried yogurt.
Club soda at room temprature is good for loads of water soluble stains. Slowly dribble the club soda on to the stain but not to much. Or if it is really dried in. Sprinkle Baking soda on the stain and leave stand for $mins and hoover