If you are trying to lose the last few pounds/ounces and your diet is pretty clean try cutting dairy and artificial sweeteners from your diet (the only sweeteners I take are in my post workout protein shake).

From the research I have done dairy can cause a spike in insulin (see my previous post on insulin).

Here are a couple of articles on this topic

http://www.marksdailyapple.com/dairy-insulin/

http://www.livestrong.com/article/546921-what-causes-insulin-to-spike-with-milk-products/