Why doesn't burning incense set off a smoke detector?
Make sure its double insulated. On the transformer or controller you will find a square inside a square, although check with the manufacturer
Call the office today and tell them you are still occluding on that tooth first. What is happening is the tooth is being lifted up from the inflammation in the bone around the root. By hitting the tooth like you are, you are increasing the trauma and hampering the healing process. No, they didn't loosen the crown. If it was loose, it would come off when you chewed.