What causes streaks is not water but residue. It's important to remove the solvent from the lens before it completely evaporates, regardless of what the solvent is. By definition, the more volatile the solvent, the quicker it evaporates, so your technique needs to be good. If you're having problems with streaks, you're letting the solvent evaporate on the lens, which is going to happen if you wipe it to a thin layer and just leave it. That's why Tele Vue's instructions don't say anything about doing it like that. Most of the cleaning products made for the general public are formulated NOT to evaporate quickly. That way, people who don't even know they need to can usually get it wiped off before it evaporates.