Anyone found anything that works successfully on banana - I now feed DD banana rather than letting her feed herself because have ruined too many things. I have tried SARD, tea tree oil (recommendation via google) various washing powders and the sun - but still looks like mould in the clothes.
Oh! It must be banana!! It def looks like mould!

Thanks for the tips everyone! I think I am leaving it too long before attending to the stains.

As for banana...there must be a solution!