Getting rid of yellow deodorant marks- how?!

[Marmaladegin]

There must be some solution to this... I love simple white vests and tees, but it's going to be very expensive if they keep getting ruined by deodorant after a few months.

I have tried soaking in stain remover for 24 hours, then washing and drying in the sun...but it's made little difference. Please someone come along with tips!!

A paste of hydrogen peroxide and bicarbonate of soda usually works.
Then change your deodorant, it's that that causes it, not the sweat (apparently)