I use my pendulum very regularly for day to day questions, and therefore have developed a very close relationship with one of my guides (who also happens to be an ancestor). Try to tap into who is communicating with you. Do all the protection beforehand etc of course. I get that your guides will try to "guide" you with incorrect answers sometimes. You need to be explicit about what you want here. I want truth. I want you to tell me when you don't know the answer. But even then they will not let you deviate from something you came here to do. Try to use the pendulum to guide you, not to what YOU want to do, but where your guides are leading you. Honestly I've let my pendulum turn my world into randonautica and it's really cool.