So, your ex just dumped you and you want revenge. Make sure you leave something over at their house so you can make sure its possible to go back in their house.
Okay. All you have to do is make some GOOD itching powder, by taking some fiberglass and grinding it with sand paper, DO NOT touch the ground up powder with your bare hands, put on some latex gloves or some kind of protection for your hands and pour it in to a small but strong bag, thats the first step.
Now you want to call them and say you left your _____ at thier house make sure to take the itching powder and gloves. When you get to their house say you have to take a crap and that you’ll be right back, go in the bathroom, sprinkle the itching powder on the toilet seat and on the sink things where it turns it on, and in other frequently used places.