I know how to use it.
I was just responding to : pristine.
If you think just spraying with the bum gun is making it pristine , ok for you then.
If a surface like glass has some excrement on it , and you shoot it off with a bum gun , would you lick that surface ?
Well you probably would , I wouldn't.
Now instead of glass , think of skin with pores and creases.
Still think it's "pristine" ?