I am CG but when I used cones all I did was make sure I used a shampoo with that ingredient and that was how I got them out. I haven't used a sulfate shampoo in Lord knows how long. I do see curlies on here telling people they have to use a sulfate to remove silicones and buildup but I don't find that to be the case. There is an old naturally curly article listing all the silicones and what it takes to remove them. Should answer your questions.
"More people would learn from their mistakes if they weren't so busy denying them." - Harold J. Smith.