I seldom remove inflo. when rooting cuttings or while cuttings are rooting (sometimes an inflo. will grow before the cuttings roots, particularly the "reds" that can take 2 mo. to root. I simply don't find any reason to remove them. The cuttings root just fine and in my experience, just as quickly. To determine whether a cutting is rooting, I perform the "tug-test". Simply grasp the stem of the cutting and gently tug upward. If the stem comes out of the rooted media easily, there's probably no roots or perhaps just a few, stubby roots. If there is resistance to dislodgement, the cutting is rooting. Generally speaking, when you see those tiny, terminal leaves growing larger, that's an indication that the cutting is rooting. That's when I do the tug-test. I don't bother pulling on the cutting if there's no definite leaf growth.