Spanking doesn't work. You need to try an alternative like time outs. A minute per their age. Or you can warn that, "If you do that, you're not going to get to go to the mall this weekend." Or "If you continue to do that when mommy has asked you not to, you will not have time on the iPad tonight.", etc. Small measurable action/reaction, action/consequence practices. Nothing mean or severe. I was spanked as a child.....it did not have the achieved affect but when I was grounded (from doing something fun...that was more effective. Also, the consequence has to be commensurate with the action. Meaning if I didn't listen, they didn't send me to my aunt's house in Iowa. If I forgot to set the table, they weren't mean and didn't let me have a snack. It's common sense, some careful thought and parenting with love and some kindness but outlined boundaries.