Add a setting for days/hours when remembering device, so the user can choose a custom duration. It's currently set to a fixed duration of 30 days, which I find kind of long. This could be implemented as a simple dropdown (or scroll-list thing on touch devices) with predefined durations like "30 days, 24 days, 14 days, 7 days, 3 days, 24H, 12H, 6H, 3H". (See attached image, the leftmost part.)
A similar thing already exists in the LP Master password reprompt, which is also a dropdown with predefined durations (see attached image, the rightmost example).