EDIT: After looking at your pics. Mine wasn't that bad. On the Tube itself was just some residue. I didn't have any build up on the actual inlet. It had a problem with cutting out. But It was also due to my clamp being completely stripped and loose. Bought a new clamp and it runs perfect right now.
Never had problems like that...KNOCK ON FREAKIN WOOD! Well glad im not the only one...And it doesnt seem serious, but who knows.