Nothing, absolutely nothing. Well, not exactly nothing. I was able to see moisture that was left on the windows. It is sooooooo humid and windless that the dew/humidity has collected on the windows. This was today and the humidity level has been extremely high for the past two days. High tomorrow is suppose to be 97 and humid. It's summer and we should expect this. Beats shoveling snow. Make it larger and you still can't see clearly.