Incense, candles, crystal and exorcism (Roman Catholic perspective)

I have read that incense is a bad thing and it can bring demons to your house. However others say it will create a clean house. Rabbi Keduri, some say, did smoke incense, but he did not inhale it, and when asked, said it was supposed to keep the demons away. What does the Catholicism say about it? What is so special about smoke, candles and crystals? Could any Catholic experts give me a good source?