Stick Up Cam Wired

I just yesterday finally installed my Stick Up Cam Wired.I have installed it just outside my bedroom window (UPSTAIRS) and am disappointed with a lot of the outcome.It has been freezing temperatures during the evenings and nights.The result is that the lens on the camera is totally obscured by condensation and can only be cured by my leaning out of my bedroom window and wiping the camera down with a paper towel.This makes the use of the rather expensive camera a waste of money.Solution please?