White material turned green at zip line (Multicolor item)

[Miss Bel Air]

Hello,
do you know why the colour of the white material turned green / darker at the zip line?

It looks old/dirty like this.

I didn‘t use this key holder the last years. It was always hanging on a bag in my room.

 

[LVlvoe_bug]

Hello,
do you know why the colour of the white material turned green / darker at the zip line?

It looks old/dirty like this.

I didn‘t use this key holder the last years. It was always hanging on a bag in my room.

View attachment 4952595View attachment 4952596View attachment 4952597View attachment 4952598

It may be oxidation from the zipper?

 

[Miss Bel Air]

I think I cannot do anything to remove this colour change?

The same problem with my white Multicolor pochette.

 

[23adeline]

Try mixed Sodium Bicarbonate with Hydrogen Peroxide to make creamy form (slightly watery) and apply with cotton bud on stained area , gently rub it . I managed to remove stain on a white zipper by doing that. Good luck !