Perfect Window Treatments for the Kitchen or Bathroom?

Though I generally find myself drawn to fabric drapes (especially those with excellent room-darkening properties in the bedroom), my love of textiles falls down when it comes to kitchens and bathrooms. All my previous homes have featured privacy glass in the bathroom and small kitchen windows whose location afforded privacy. Now however, I have a guest bathroom with a regular glass window and a kitchen with a giant picture window, and both windows are on the front of the house looking right onto the street.

Right now I have a curtain up in the guest bathroom but since the window is right next to the tiny shower stall area, it gets soaked anytime the shower gets used. The kitchen has a giant wooden blind that seemed like a good idea but isn't- grease and moisture and the ever-present sand make keeping the white blind clean a disaster, especially since I have to climb onto the kitchen counters and stetch over the sink to reach most of it.

I'm torn. My personal preference is for no window treatments in the kitchen and bathroom but that just isn't an option here. I need some privacy so I don't have any more conversations with my neighbors about my polka dot PJs and so my guests are able to use the bathroom, but my exisiting solutions are just not working. I'm looking for advice — what are the best solutions for window treatments in the moist and messy environments of the kitchen and bathroom?