any tips on getting white eskadrons clean?

**sorry for the lack of capitalization, I'm on my phone.

Anyway... I have a set of older white eskadrons thay were given to me by a friend. They're pretty dirty and kinda yellow.

Any tips on getting them white again? I got a lot of the dirt off when I put them in the washing machine, but I'd really like to get them whiter.

Its just the plastic that's dirty, so I can rinse any stronger cleaners off with hot water and soak them before use.

Thanks so much!
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Hav you tried one of the Magic Erasers? They seem to work well on lots of things.

I haven't. I considered trying a bleach pen as well. I wanted to see if anyone knew of anything that for sure worked before I put one of my "brilliant" plans into action. Haha. ;)
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