How do I clean a disgusting bathroom?

sweep up the floor, then take rags and wash the whole room down with bleach. Open a window or turn on a fan, make sure to wear gloves and a mask as the fumes will be strong. Then go over everything with your regular cleaners. The bleach will sanitize and going over everything again will clean up anything the bleach missed. You might want to just throw the rags out when your done and run your broom through some bleach water when done using it.