How do y'all keep mirrors that are set at 45 and 90 degree angels clean? How do you clean the lower edge?

Add a teaspoon of distilled alchohol to your cleaning solution and use a fine cloth to clean it. The extra alchohol helps prevent the water-spots that are often left behind... Otherwise, I've found vinager is also a great glass cleaner and won't leave streaks behind...

To get up into the corners, use a piece of butchers paper or newspaper for the initial scrubbing...then come across it with a disposable shop towel (these won't leave lint behind)...

Hope that helps!

-Bryan