First Ill thank everyone on this site for the great advice! Ive been passing DOT randoms for a year with sub method. Today however...i didnt have enough clean urine to fill the cup..i maybe got like 2 teaspoons of my own VERY dirty urine in the cup. What does anyone think of this? Ever happened to anyone? I hope it wasnt enough to affect my negative result..this would be devastating. Please respond with experience, advice, opinion??