Poor Lemon Tree

My poor lemon tree has not done well this winter.  In early November, I started noticing the leaves dropping off and I assumed it was because I was over watering the plant.  Boy was I wrong.  After closer examination, I discovered it had scale and it was bad.  Last year was aphids and now scale.  After consistent spraying, the scale seems to be under control.  At one point all of the leaves dropped off, but there are new leaves so there is hope.  I am going to re-pot it in mid-May and see how it does.

I have been trying to take outside on nice days. 

Nice new leaves

Looks dead from this angle.