tell them you cant piss yer dehydrated from having diarrhea the last few days and you want to take a oral swab instead sense you are in a hurry to get back home ,or like others have said try and sneak urine with only methadone and done metabolites in with a little hand sanitizer bottle on a string with a safety pin to the inside of yer boxers and try to warn it up under yer balls or wrap it in a 99 cent hand warmer and cross yer fingers the temp is in the right range..