I am adding a 4 way switch to a 3 way sw system. I am going to put the the new 4 way switch where one of the existing 3 way switches is currently. I am running 3 conductor cable the the new location and then i am going to put the 3 way sw there. My question is i need to use all 3 wires as hot, how do i mark the white one ??
Either is fine. Don't forget to mark both ends of the white wire as well as both ends of any other white wire that this "re-marked" wire is attached to.
When cleaning anything including baby diapers, it is better to sweep off or scrape off as much solid and semisolid material as you can first. (1) Less cleaning fluid or detergent needs to be used, (2) Less of a mushy mess which in turn means that bleaches or disinfectants will be more effective.