well I am on methadone, and get take homes which means I ve earned the right to go to the methadone clinic only twice a week I go on Friday drop off my empty bottles ad return Saturday and pick up my full bottles for the week anyway I have to submit to random urinalysis which have been clean for close to two years, however I ve had maybe four times that my urines came back with no methadone however I have metabolites, so I usually have to do a mouth swab to make sure Prove I am not messing with the urines any way I ve been clean and am baffled why my urines have no methadone sometimes.. My question is this are there outside factors that can speed my metabolism to a point the methadone is pushing threw my system aster than other times I have recently gone back to work as a landscaper and been working 12/14 hour days and I drink at least 6 bottles of water 4/5 cans of ice tea can this be effecting my urine screens?