How to get orange stain out of high chair?

[PixieDustt]

Anyone know how to get these orange stains out of the high chair cover? The cover is not machine washable. Tried dettol on it but unsure what else to use and don't want to ruin the material. Highchair is cosatto noodle supra if that helps.
TIA

If its tomato, then just leave it in direct sunlight

Have you tried leaving it in the sun?

No. I live in a flat so don't have a garden.
I suppose I could try leaving it by the back window where the sun comes in. Thank you.

steriliser solution might work?

Olive oil can work well on tomato stains. I’ve only used it on hard plastic though.

Forget about it, it's a high chair?

By the window will work - this also works for stained bibs etc

Thank you for the suggestions! Will definitely give them a go with a patch test first .
I'd rather not leave it grobags the stain makes it look grubby.