I recommend doing 2 cold pulls at least before you start heating up the jugs. If you are still careful you get a whiter white still.

Also, I'm thoroughly convinced using filtered water is a major key in getting snow white.

Lastly, unless space is an issue split that key up into 4 jugs. It seems to increase surface area and thus yield.

Although your results were damn good anyways! Nicely done...re-x the stuff that isn't white enough?