Staff Bathrooms

Throughout my schooling life I have always admired and snuck into staff bathrooms. Usually in my schools there are the normal bathrooms which are usually very nasty, run down and smell bad and there are staff bathrooms which have that clean scent and are sparkling like the Mr clean commercials.

Why is there such a difference?
Are student just dirty and don't mind the filth?
Do the cleaners clean each the same amount of times?

Well I always try and use the staff bathrooms because they are always much more inviting. But when on campus and you need to go the top five cleanest public bathrooms are:

5. Prayer room SLC
4. 5th floor MC
3. 1st floor MC
2. ES building after 7pm... yeah no ES students study they are busy with the trees
1. TC (co-op building) bathrooms,