Clogged air line

Anyone got tips of cleaning out a air line that has a blockage in it? I left the glad hands open and some bug or animal got in there and clogged up the service airline to my 20 ton trailer. I’ve tried blowing it out but it’s that smaller plastic line and it runs from the nose of the trailer to the air tank for like 18 feet. Ill probably have to replace it but it will be a pain in the ###.