Brown spots on new stainless steel pot I bought a stainless steel pot, soaked it in water and dishwashing detergent overnight. 

When I went to dump the water, there was a brown ring around the top.
I then boiled water and a muddy appearance showed up on the bottom and sides.  

Can you tell me why?
"Stainless" steel is an exaggeration at best. It will stain. Chances are you have some level of mineralization in your water (hard water), and that's what's causing the discoloration. 

If it really bothers you you can use Bar Keepers friend or something similar to polish it, but it's unlikely that anything that doesn't come off with normal washing will come off in your food.