Open a Google Chrome window in Incognito mode with Ctrl+Shift+N. This saves a lot of time in clearing cookies between account rerolls. Enter Developer mode with Ctrl+Shift+I. On the Developer mode side toolbar there is a button shaped like a smartphone screen in the top left. Click that button so it turns blue. Under Device on the orange portion of the toolbar above the webpage, select any model, such as Google Nexus 5.