[deuce lover]

When using hydrochloric acid to clear the line I do a rinse with acetone or laquer thinner several times and low pressure compressed air to blow it all out. If the line does not clear with the acid in a few min then it is really plugged.The wire will work only to the 90degree bend at the base of the glass tube. I have had a few that were plugged solid so had to cut the line about an inch from the brass hex and then with the wire to roto root the line.I then use a bit larger piece of the copper line and slip it over then soldered to reconnect.
Renners Corner sells a new sight glass tube with the copper line.The line needs to be soldered on to the hex.
Here are pics of one I had to splice