I think the dilution method in the sticky will work just fine for your considering you probably don't have a huge amount of thc built up. But since its an employment test i see no reason not to go with substitution since it's guaranteed to work provided you do it right, and assuming you won't be monitored.

A note on detox drinks: the general consensus on these forums, at least among people who know their shit, is that they are bullshit ripoffs. They rely 100% on dilution, which is why they "work", and you can do that for free with some water and vitamin B.

You can argue with me on this but i won't bother to try and disprove you. I'll leave that to someone else.