try this, hot water in the bong(so its steamy) and then ice on top (out of the water of course). VERY smooth, and warm water in your bong is more effective at cleaning out tars, and keeping THC in the smoke than cold water. ALSO, IIRC warm things oepn your throat up(singers drink warm lemon water before a show) so the steam should have a soothing effect on the throat.