Okay... so... There is this thing floating around on pinterest claiming that dawn dish soap and hydrogen peroxide can remove yellow stains from white shirts.
I am here to tell you that this claim is completely and utterly TRUE.
I tried it. Just like the lady's blog said I should... go HERE .
And the yellow deoderant stains disappeared. It really. was. magic.
Maybe you don't care because your genetics don't predispose you to overactive sweat glands... but mine sure do.
I did notice that the older the shirt was... the harder it was to get it completely clean... but just the fact that MOST of the stain was gone on my ancient undershirts amazed me.
So. Go forth and remove your pit stains.