Hello everyone, Today I finally picked up a pipe, a Medico Varsity briar to be exact, so it's rather cheap. When I returned home with it I noticed the stem had a sticky substance left over from a price tag, so I took some rubbing alcohol and rubbed it off. I proceeded to then rub the entire stem in an attempt to clean it up, but there was a tan stain color on the cloth I used. I thought nothing of it until I placed the pipe in my mouth and recieved a strong chemical type taste, after which my pipe literally began turning colors; into a greenish-yellow hue. I'm not sure what this means. I tried to do a search, and the only thing I came up with was that the stem may be a vulcanized stem, but i'm not even sure if this particular stem is vulcanized, or if the company even uses the vulcanized rubber type stems that are vulnerable to oxidation. After I cleaned it up, I smoke my first bowl of tobacco, but I noticed that near the head of the stem that was placed in my mouth had those colors again. Is this normal, or is the stem hazardous? I'm totally freaked out.