The lateral sewer line from my house to the street clogs about once a
year, in spite of my putting drain cleaner in regularly. The guy who
cleaned it out last time said the line is broken. The town says it's my
responsibility. It would be several thousand dollars to dig up and
repair the line. I've heard one company claim that it can replace the
line without any digging (I suppose by inserting another line through
the old one). What's the best way to deal with this problem: Have the
line cleaned once a year, get a new line, get a better sewer cleaner, or
something else?

Any suggestions would be greatly appreciated.