The detox drinks are an expensive form of dilution. Most of us do not recommend them.

Invest in some THC tests online and you will know. I got mine for under $2 a piece. Test first morning urine... if thats dirty then test again after a little dilution.

If you do get called soon for a test, have some creatine to start taking at least 24 hours beforehand. This will increase your creatinine levels so theres less chance of coming up dilute if you hand over a watery sample.