He probably learned to pee at some point I would think. However, as with all PED users, the question isn't can he pass several tests in a row it's whether he can pass them all, all the time. Maybe AC quit juicing, most guys who get caught probably do, but the impact of doing so will be seen this coming year more than it would have been last year. There is still residual benefit to juicing for a while after you stop and AC had that for the remainder of 2021. Will he be the same guy in 2022? Hard to say.
At the risk of getting flamed badly, Harris was not the same guy in 2021 as he was in 2019. That could be age of course, but maybe his lack of supplements was part of the equation too. We didn't see a massive drop off in his ability to play the game but we sure saw him struggle with injury and a lot of guys juice not to build muscle but because it really speeds up healing.