Large Painful Flakes

I have severe psoriasis and it is so much more painful than it was several years ago. My scales used to be red and if I left them dry out the psoriasis would be covered by small white flakes. Now however the flakes on some of my patches are the size of cornflakes and much thicker and painful. The dovobet prescribed doesn't do anything to the larger flakes and I bath in dead sea salt to remove the flakes but they return very quickly and where present or not I am in constant pain. I will be starting a biologic so am hopeful the skin will clear to an extent but wondered what others do to counter this (I don't smoke or drink). Thanks in advance