I been liking this new Mark Jacob short sleeve button down shirt I've got. It's 50% silk 50% cotton and I am noticing severe sweat stain on the arm pit area probably because this fabric is not very absorbent. It's very annoying...I feel I can wear this shirt 5 times without dry cleaning if not for this problem. I try using this antiperspirant called Jack Black Pit Boss and it doesn't seem to stop the sweat, if anything the stain is now a little sticky, it sucks. Anything I can do? Other product? Shave/trim the hair (I am not hairy)? I know wearing a t shirt underneath works...but I like the lightness of this shirt and don't want to wear an undershirt.