Have a look at this new Adobe Camera Raw feature

I was looking at new features in the latest ACR feature and came across 'Distraction Removal - Reflection' feature. I think it is amazing! Once the edit has been done, a slider can be adjusted to move from fully gone, to partly gone, or increase the reflection.  

All you need now is a good window cleaner, and it doesn't remove bird sh*t ... Laughing (Hope nobody minds me posting this here as I still can't find my way around - I've only been a member for 3 years ... Blush)