Our company website airquippipetool.com.au randomly goes to mobile mode (takes out home page images and menu for easier viewing on a smaller screen) across several different browsers and computers. Seems to have no pattern to whether it shows up in full or in mobile mode. When it opens in mobile mode, the "view full site" link at the bottom of the page doesn't work.
Does anybody have any idea what's going on, or how to fix this?
P.S. How do I go about changing the way things look in mobile-friendly mode?