I have stubborn drains on both lav sink and tub - bought a 25' hand snake today, cranked the heck out of it on the sink - still no good. Got maybe 6-8' inside the pipe under the floor, still getting resistance (and a sore shoulder). Tried baking soda and vinegar - got a good show, but it sat in the drain, even after covering it up (it was worth a shot).
I'm thinking I need something more powerful - any advice on DIY style to buy (ideally something to hook to a drill)?
Thanks as always.