A little background first. Back in December of 2015 I formally announced to my employer that I was "officially" starting my transition (up to this point I was living as my true self everywhere except at work). They went along and it was announced company wide and also to the employees at the site that I am stationed at (I am involved in security for one of the local housing facilities). Needless to say I deal with the public on a daily basis. I have been at this site for over 4 years so most of the residents know me from before I started transitioning. The new residents and people coming in occasionally aren't a problem, for the most part they accept me and treat me as I appear. Some of the older residents however still refer to me as I used to be (he, him, sir, etc) and that is where my problem is.
I understand that most of them aren't doing this to be hurtful and that is where my question comes up. I know I should get a thicker skin and try and not let this bother me, however sometimes it gets to be quite painful.
I don't want to be constantly explaining to people but I can't think of any other solution. Have any of you had to deal with this type of situation, and what did you do to handle it.