Water dispenser line frozen in door-GE side/side

The water dispenser line in my GE side by side refrigerator keeps freezing somewhere between the bottom of the freezer door and the dispenser. I have been using a blow dryer to warm up the door (stainless steel so it absorbs the heat). After a while, the water will defrost and water will then flow freely from the dispenser. I heard that GE can repair this by installing some sort of water line insulation or heating element. Does anyone know if there’s a part I can install to fix this problem so it won’t keep happening? Thanks!!