I'm certain we've all had issues logging in, but I've gotten the hang of disabling cookies before pulling a Ron Swanson on my device.
First step is to find that 3 dot menu on the right hand corner.
Next, go to settings.
Go to advanced settings.
go to privacy settings.
Lastly, go to "Cookies" and, if you're as ambitious as I am, click the "Manage Exceptions" option before entering the SFK Domain and hitting "Block."
Should work okay for you. Otherwise, you might have to repeat the process of deleting the cookies.