I need some advice on my circa-early-1900s plumbing. The tub plugs up about every 6 to 9 months. We snake out a good hair clog and move on with our lives. Tonight we can’t snake the clog. This happened one other time and we paid Roto Rooter a couple hundred dollars for a visit. The Roto Rooter guy tried to sell me some treatment for another couple hundred dollars that would smooth out the pipes and stop future clogs. It sounded like snake oil last time, but now I’m wondering if they can actually do something to help. So A) I’d like opinions on a good Duluth plumber to work on a clog and B) would like to know if the Roto Rooter treatment is worth $200 (or whatever it costs these days).