Duluth Plumbing Advice

This doesn't offer advice on either A or B, but I will mention that we have a $2 plastic grate over our drain that stops hair from going down. It's not a favorite chore to clean the hair off, but it does keep the pipes from getting clogged.

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I've been using a similar device in the kitchen sink. It's totally disgusting, but does a great job of preventing clogs.

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But as for directly answering your question, call Don Peterson at Advanced Sewer Systems -- 218-727-3355. He'll sort out your situation at a fair price.

We have said grate on all drains. I went with Ben Franklin which I know is a chain, but they answered their phone, and had a drain cleaning special ($88). He did not push the enzyme cleaner. I did buy some. Looks like Ben Franklin bought out a local guy as the guy who did the service has been here working on the boiler before we owned it

Most plumbers will tell you to buy the $2 plastic grate.

Try some sulfuric acid from a home supply store.  It will have a big ol skull and crossbones on it.  It dissolves organic material and keeps the lines open.  I use it in my house 3 or 4 times / year.  Just read the instructions and don't screw around with it cause it is very  effective on organic materials.
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Oh. My. God.  Ow-ey.

All I can think of is the old plumber joke: ...runs downhill, the boss is a ....., and poop runs down hill. Any way, after you clean it out, make it a habit to put baking soda and vinegar down there once a week. The screen drain cover is the best I have used so far.