Cleaning a Yellowing Jersey That Is Signed

[droop685]

I have a white Knicks jersey that is yellowing but it is also signed. Any ideas what I can do to make it white again without damaging the signature. Signed twice in front and back

[Juicyfruit66]

is it sweat stains yellowing or the whole jersey? I'd leave it as patina unless it's pit stains

[droop685]

No it's not sweat. It's the whole jersey. Never been worn. It's just yellowing from age. Almost 20 years old

[Juicyfruit66]

I'd just let it age to its petina, it'll look its age