WARNING:
Spray on cleaners used in households can cause serious damage to curtain fabrics.
Many fabrics are not colour fast and many of these cleaners will either change or remove the colour from the fabric.
Sometimes this may not be noticeable until the curtain gets wet, either when being cleaned or through water ingress at the window.
There is no way to remedy this and the curtain will remain damaged.
The pictures below show what happens.
Splotches show where colour has been stripped from the curtain material.
Couldn’t agree more with your comments on the spray cleaners for curtains. We here at Curtain Design are happy to provide some fabric for anyone not just our clients to try any cleaner on first.
I recommend if you can’t get a sample piece or fabric you us the back bottom corner to try it out before treating the rest of the curtain.