not sure if this works...

[taintedminds]

i have a friend i used to work with. the place i worked required a drug test. this kid was a hardcore pothead. who isnt though? but i asked him how he passed. he said he put a drop or 2 of bleach in high urine sample. can anyone confirm if this works?

[Avengerdriver]

I know that the confirmation tests are made to detect the presence of foreign substances in urine but I dunno about initial tests.

Either way I've heard the same about Visine, windex, and other stuff.. I really doubt it'd work.. I imagine the lab would get an inconclusive initial test and then would send it off for a confirmation.