I definitely wouldn’t use a hair dryer, if it’s going to be a constant problem and a simple fix to thaw the ice in the tube get a small steamer, that won’t melt or warp the plastic. Not sure it’s worth spending $1000 to replace the door due to poor engineering when you can just thaw it every now and then. I have been repairing appliances for 12 years, the small steamer is definitely the way to go and very quick.