So. How does an urban yogi clean and dry her yoga mat in an apartment that does not have a balcony, porch, deck or any other form of outdoor space?
True, I could hang it over my shower curtain rod but I want it to have fresh air and sunshine of course!
What you do is, you open the window (mine open IN), and you hang the mat over the window, see, like this : 
And then you have to reposition it every so often so each part of it gets some window time.
It’s not quite the same as “hanging it out to dry” but it’ll do! 
Here’s another view.
Now you know the deep dark secrets of the life of an urban yogi.
Happy Friday, happy 4th!
C.