[galvanizer]

I haven't had problems with either (pressed or loose Blot) but there is a chance that the ingredients in the pressed that help it form a 'cake' are the culprits to your reaction. You just might have better luck with the Blot loose (which is almost identical to the Pro Set loose... I have boxes to both and the first 15 or so ingredients are the same).
See if you can get a sample of the Blot Loose first though to try out. It is a really nice powder!