Just down a gallon of water prior, urinate 2 or three times before the test and by the time you get there your sample is so diluted any traces of anything are not enough to throw up any flags. Worked for me.
Coarse edged youth, the irish pendants string from their smiles
not yet plucked as to slacken the seams
and drag down the features of age,
no folds or creases from unkempt wear
eyes of tranquilty, crystalline-beads
no sign of despair in their hair, nor their hearts
but oh they have yet to be experienced and that makes aging so very worth it...ML circa2012