I've had no staining of any kind on my ATT and I use it more than any of my other razors. In fact it is the only razor I am using right now, my R41 and several vintage razors sitting unused in a box, and a Merkur sold. I have an Oristo (316 stainless) and a Timeless (304) on the way and I can't wait.I think its 303. And what I'm experiencing in 303 ss (ATT) is sulfite staining. Nevertheless its a pia and not expected. However the sane conditions but for a stand up stand in the rockwell with a higher ss grade showed no staining. So its possible the ss or the stand up stand didn't let residual water dry off or drain out.