Ask Engadget: best smartphone car mount?@ 2013/01/06
"I've ditched my GPS unit for a Galaxy S III in my car, but I can't find a good windshield mount. Are there any models that don't use suction cups? For some reason they won't stick to my window, and yes, before you ask, yes I do keep it clean. Thanks!"
While we wouldn't recommend doing anything unhealthy, we've found a good lick on the suction cup before attaching it sometimes helps. Your mileage, however, may vary. Still, you could always try one of TomTom's generic smartphone dashboard mounts or perhaps even using a Bean Bag mount? As for a window mount that doesn't use suction cups? That's a question we'll leave for our friendly commenters to join in on.