Same case with me, I fired the old maid, but I got soo nervous that I developed matitis at that time. now think back it is not worth it, just fired her and also you can hire a local part time thru labour deparment for the time being. that's what I do, now my new maid is very good.
remember no need to be nice to your old maid, since you never know what she will do to harm you and your family. also she will tell you lots and lots of story. remember if you be nice to her you are just harming yourself.