Hello All.. Im hoping for a bit of help I noticed a little leak from the winter drain plug on the hot water fume vent, so i thought i'd remove it and put a new oring on. Its fairly new to me and it appears its not been off in some time, anyhow, the bloody end has sheared off the top of the plug and the remains are still threaded in!!!!!! What am I to do? how can I remove the bit of still threaded in plastic ???