Why am I still getting icicles after blowing insulation?
I have a cape cod and the attic spaces formed by the knee walls gave me really bad ice dams and icicles.  I made sure that these spaces had route for warm air to rise and escape however they were missing soffit vents.  I added soffit vents and I haven't seen a single issue in three years.  Ventilation is definitely going to help.  You need to get that air under your roof sheathing closer to the outside temperature.