I have saved and used the edges. Especially when it's a batik back. After a while, the stickiness goes away and it is just stiff like it has been starched. I just fold the sticky in on itself. I have also washed the fabric in a lingerie bag. I think it depends upon how much is sprayed. If it's a direct hit, you may want to toss it, a light over spray, it's doable.