New answers tagged techniques
I'd suggest marking the root-beer smelling lines as your soda equipment and get new "beer-only" lines. You might be able to get the smell out of the plastic with enough heat and time, but they're cheap materials. All the expensive metal parts that came in contact should be fine. Be sure to consider your keg's seals, it's possible you're getting some aroma ...
PBW + hot water (I believe 140°F is the recommended temp) has always worked for me on stainless steel parts. You may need to replace the plastic parts, i.e. tubing, if line cleaner or PBW doesn't work.
I have a buddy who did this for several years before investing in a beer fridge. Its not ideal, but it works. The main difference to remember is that C02 becomes more soluble in liquid as the liquid drops in temperature, and less as it rises. So this means you'll need to push more C02 in to carbonate room temp kegs than cold ones.
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