vanish spray left on in sun caused yellow stain on fffing expensive sheet

[fothergill]

Nnnnrgh! It was a period moment. I actually got that stain pretty much out and then decided to give it a blast on the line with vanish remover spray to get the last shadowy bit out by the sun but WHO KNEW that that vanish + sunlight= deep yellow??? Now I have a massive stain.
Is there anything I can do?

has anyone ever had this problem and solved it before? I am hoping it is something simple like..rewash them in salt or something weird but simple.
I spent years justifying buying them, I will know that my foot is resting on a yellow stain and cry dry tears every night. Please help.

I had this problem with a white unicorn ride on toy help??