What caused that is for your first test, youve managed to dilute the THCA concentration in your bladder enough to register a negative. The effects of any dilution technique (that includes using magic "detox" potions) are only temporary - once the fluids ingested had all been urinated out, the bladder is replenished with fresh THCA-laden urine, and thus the donor resumes testing positive for THC. This is what happened in your case.

ALL "detox" products work by diluting. They do not rid the body of THC as the sales pitches would like the consumer to believe. They are nothing but a big scam to separate the credulous from their cash. You can spend an obscene amount of money on a magic elixir and accomplish nothing different than what can be accomplished using water and vitamin B2.

There is no product that can permanently rid the body of THC. Only time and fat-burning exercise can do this.