In the C-building the cleaning staff cleans the common kitchens, hallways, toilets and bathrooms 5 times per week. In the P-building, only the common hallways, toilets and bathrooms are cleaned 5 times per week.
Keep in mind this does not mean you won't have to clean your own dirty dishes and your own room. Please make sure to clean the dirty dishes and regularly take out the garbage in your own room as well in the kitchen once the garbage bin is full. Cleaning equipment is available in every hallway (see the heading 'Vacuum' for more information).