I use whatever I have to hand that provides some sort of moisture. The last two times I've used Elasta QP DPR-11 for about 5 mins only without heat. Works well for me as a DC and as a follow-up to my protein treatments.
After a protein treatment I use a moisturizing conditioner, most likely Lustersilk Oilive Oil Cholestoral or the Lustrasilk Shea Butter Cholestoral always works well.