FYI oxyclean is quite good at this, and so far hasn't damaged any of my clothes including dress shirts. The key is to soak the collar in very concentrated oxyclean solution (~1 full scoop or more per gallon) for several…
FYI oxyclean is quite good at this, and so far hasn't damaged any of my clothes including dress shirts. The key is to soak the collar in very concentrated oxyclean solution (~1 full scoop or more per gallon) for several…