ammonia aftertaste

I have been using UT for about 2 months. I started with a teaspoon, and am now drinking about 2 cups daily, always fresh, and showering with a cup where I will rinse eyes, sinus area, massage on face & neck, and apply to pimple area. I also brush my teeth and gargle with it, and apply to a couple of dry patches on scalp. Hoping to get relief of joint pain and end having colds. I had 3 colds back to back and got frustrated and read how UT can end colds. So far so good, I think I have prevented 2 from wanting to come my way. My question is, about 30 - 60 seconds after drinking my urine, I get an aftertaste of ammonia in the back of my throat/nose area, not really in my mouth. I read somewhere where someone else had this experience, but I did not see where he had received any replies as to what it might be. My pH runs around 6, but even when I get it around 7 the aftertaste is still there, so I do not think PH is the reason. Any ideas? thank you