When swabbing the sensor, don't use the same swab for multiple passes over the sensor. It took me 4 swabs this time (the first time it took 3 swabs). The more I swabbed the sensor, the more streaks I saw. Finally on my 4th swab I swabbed it one with one side and once with the other side and just stopped there. Streaks gone.
Also, don't drench the swab with the cleaning formula. It takes longer to dry and is partially responsible for the streaking. Although in theory it makes absolutely no sense why there would be any streaks at all. Mmkaythanks.