I use AquaMira (which I love) for water treatment. I use my cooking pot or submerge my water bag to get water, depending on the water source, which I then treat. I haven't been sick yet, but I wonder if I'm playing with unnecessary risks. How concerned should I be with untreated water around the nozzle of the water bag getting into my water tube? Am I contaminating my cooking pot with dirty water, or do you think it gets sterilized while heating? In short, should I have a designated "dirty water" cup and funnel for scooping the water into the bag? Thank you!