I recently bought a generic car smartphone holder -- the kind that clips or suctions to the vehicle, then holds the phone in place with foam-covered clamps on the sides. The phone fits in great -- but whenever the clamps are closed, I can no longer click reliably on it. It gets the horizonal component of where my finger is right, but it's like it picks a random vertical position every fraction of a second. Has anyone experienced this before? If so, what is the solution?