Here's the tricky thing about this. With scleroderma, we can get dry skin just like anyone else and of course it can be caused by weather (including the drying effects of heaters), soaps that strip the oils from our skin instead of replenishing it, etc. It could be as simple as the water softener running out of salt. See Causes of Dry Skin by Mayo Clinic.
We can also can get itching and other odd skin sensations when we are experiencing skin tightening and hardening.
And, of course, we can also get very dry skin and skin fibrosis at the same time.
The only way to know for sure what is going on is to consult your doctor, or go straight to your dermatologist (if your health plan allows, and if your dermatologist is savvy about scleroderma.)
If you are confident that it is "only" dry skin in your situation, Sweet recently started a thread here about Safflower Oil for Dry Skin, which might be something you might like to try. You could even do an experiment for us and apply safflower oil on one side and your regular cream on the other, and see if it makes any difference for you.
The important thing here is that if you don't know the difference yet between the feeling of the skin fibrosis process and regular dry skin, you could easily mistake one for the other.