We have a four year old girl with extremely high confidence and head strong with it! She is unbothered by all forms of punishment from removing toys to the naughty step. Recently while being on naughty step she has resorted to swearing and yelling we attempt to ignore her and let her sit out her 4mins and talk calmly with her after asking her to explain why she was placed there while we explain are expectations of her.
When she misbehaves in public we give her a first warning and then if that fails she will be placed in a spot for 4mins but if anyone passes by she will swear at them this is constant.
Could do with some advice on how best to deal with this, being firm and calm and using the naughty step just doesn't seem to be working :/