Complex sentence: Nowadays, they often change bed linen, vacuum the rooms, empty bins, etc, and their role varies from college to college: some do not make beds at all, but others go so far as to take care of their students washing up.
Split into simpler sentences: Nowadays, they often change bed linen, vacuum the rooms, empty bins, and other domestic services and their role varies from college to college. Some do not make beds at all, but others go so far as to take care of their students' washing up.