Reddit reviews LvDD Double-sided Window Cleaner Glass Wiper Magnetic Cleaning Tools Useful Surface Cleaning Brush for High-rise Double Glazed Windows Thickness 0.5"-1"(15-24mm)
We found 2 Reddit comments about LvDD Double-sided Window Cleaner Glass Wiper Magnetic Cleaning Tools Useful Surface Cleaning Brush for High-rise Double Glazed Windows Thickness 0.5"-1"(15-24mm). Here are the top ones, ranked by their Reddit score.
One of those magnet cleaning things might help, but only if your windows crack, which many in NYC do not. They don't need to fully open, just enough to get your hand out.
https://www.amazon.com/LvDD-Double-sided-Magnetic-High-rise-Thickness/dp/B01M8IBXN3/ref=sr_1_1?ie=UTF8&qid=1487197297&sr=8-1&keywords=window+clean+magnet
This. Just be very careful... the magnets are simultaneously way too strong and way too weak and can either pinch your fingers terribly or fall off the window.