Hello, a friend of mine acquired some ketamine and it came in liquid form. My friend stupidly decided to dry it on a cookie sheet instead of a pyrex glass 
After drying for a bit in the oven, the ketamine gained some dark coloring from the cookie pan. How should they go about washing out this coloring from the pan? Thank you all in advance
After drying for a bit in the oven, the ketamine gained some dark coloring from the cookie pan. How should they go about washing out this coloring from the pan? Thank you all in advance