Drink 1 gal cranberry juice over the course of the next few days. shot of vinagar in the am with a glass of cranberry. I use white distilled sour as hell but then chug the cranberry ... day of the test drink as much cranberry and water that you can .. at least a gallon combines .. more cran then water... cranberry will flush out your entire system the vinagar gives your test a proper ph...... Worked for me and I get random tested.... if you "prime" your body with the cranberry and vinagar a few days before the test. If you do it right you will unrinate alot the first few days flushing out your bladder