i miss my color changen pipe good times where had with that thing. damn 4x4 accident.
and yes when u clean it. it will go back to its normal colors. leave it dirt it changes colors.
how ever cleanliness is key to smoken outa a pipe deff a glass pipe. its damn hard getting that resin outa the chamber. if i ever got a color changen pipe now it would never change color.
If you cant suck threw the pipe perfectly smooth with nothing in it then u shouldnt be smoken your green outa it.