I'm sure we have a cleanly ghost hanging around. This occurrence happened awhile ago now...
I was home alone and tidying up the master bedroom. I had almost finished with the tidying up and started to change the sheets on the bed, when I heard our bathroom door open, the tap turning on, swooshing sounds as though someone was washing their hands, then the bathroom door closed. I waited to hear the echoes of footsteps in the corridor but heard none.
I came out of the bedroom, to find the hall way empty and no one around anywhere else in the house. All the doors were locked. My husband and baby went out earlier to pick up the rest of the children from school. I was completely alone except for the quick visit of something or someone who dropped by to clean itself.
Our house is very small and cozy and the bathroom is only a few feet away from our bedroom, then there's the hallway leading out into the lounge room and kitchen, so there would not have been time for anybody to slip into the house, use the bathroom taps and walk out of the house without being seen.
I have not experienced anything more from our cleanly visitor since this event. I guess the paranormal like to be kept clean too and not just those of this world.