Icy courses really show off your bad habits ! Your balance needs to be centering your bodies downward force onto your edge . If your leaning too far in / drop your inside shoulder , or hand you'll be skidding out right away ! Level shoulders , boardside hand driving pressure towards the feet , and independent knees/ legs working strong. Last thing , never be tentative on ice , drive that edge in and go ! If your Squimish and indescisive your gonna be late on initiating your turn and the and that just compounds the problem.