how to remove white space under bottom of footer

Hi. I've noticed on pages on my site there's is a line of white space with code under the bottom of my footer. I google'd and found that this typical occurs on high resolution screens with pages where content is not sufficient to push the footer down past the monitor "bottom" of the screen. https://stackoverflow.com/questions/25253425/how-to-remove-the-white-space-under-my-footer-in-wordpress i tried a couple of css tricks but none seem to work on clean journal pro. Can you assist with what css would hide the overflow (something like css footer overflow: hidden;)??? Thanks. Cheers.