The most efficient way to get the methyphenidate to dissolve in water it score the white coating with a razor blade and chip it off (comes off veary easy and in large chunks), then set those flakes aside. Then use the razor blade to slice off the green section from the capsule and throw it out, it contains no medication whatsoever. Next slice through the remaining yellow/white section lengthwise but don't go all the way through, avoid cutting the waxy shell at the bottom it will make it easier to remove it in the next step. Pull both halves of the section down and just roll them off the waxy shell and throw shell remnants away. Crush the de-skinned parts but no need to make it into a powder, just small granules will do. Throw this and the flakes from the white coating into a cup of hot water, wait a few minutes, then enjoy. The crushing and the hot water significantly increase the rate of absorption of methylphenidate into the water. There will be little residue left, you can swallow that if you wish.