So I have a small white fly infestation ... after reading the best ways to attack the problem I purchased a small bottle of Neem oil on eBay ... $10 w/ shipping. I took a new spray bottle (about 750ml) and filled it with PH'ed water (in this case about 5.9) and added 1 teaspoon of Neem oil. I had to first run the CLOSED bottle of Neem oil under hot running water as it was sorta thick (sorta like you might do with Magic Shell ice cream topping ... the kind that gets hard and is super yummy but way too fattening ... err, anyway). I also added a couple of drops Palm Olive dish soap per the labeled instructions.

I sprayed it lights off last night and I was a little nervous at first but then I woke up this morning to find the babies were perky. I sprayed them again lightly misting all the tops and under sides of the leaves. I'll spray them down again in a couple of days. Since this Sunday is the day I switch to flowering I have a 2-3 week window to get rid of these bugs. After that I'll stop spraying w/ Neem oil so that I have an opportunity for the oil to break down and allow the buds to get tasty!

Pic attached of the type of Neem oil I bought ...