Yellowed sheets - help!

[IzzyHandsIsMySpiritAnimal]

I've got a couple of bedsheets and pillow cases that have horrible yellowed patches on. I think it's from sunblock rather than sweat as when I tried using bleach to clean them, the patches turned pink.
I've washed them again, soaked them in borax and they are still stained.
Overall, they're in good condition so I'd rather not get rid.

Is there anything else I could try using to restore them?

Unfortunately suncream stains are near impossible to remove. Sorry

Presoak in vanish?Washing soda, eucalyptus oil, rubbing alcohol, or citric acid? Maybe put lemon juice on & leave out in the sun when it gets sunnier? Test areas first to see if any of that works.

I can certainly try citric acid or Eucalyptus oil as I have both in the house. Shall have a go and report back!

I've no help on removing the stains I'm afraid, but you could always tie dye the sheets to disguise it!

Hang them outside for days on end, best done in the summer though. UV from the sun is really good at fading odd stains