What are the proper steps for using a pet rectal thermometer to take your pet's temperature?

To use a pet rectal thermometer to take your pet's temperature, first lubricate the thermometer with petroleum jelly. Gently insert the thermometer into your pet's rectum about 1-2 inches. Hold it in place for about 1-2 minutes until the thermometer beeps or signals that it has finished. Remove the thermometer and clean it thoroughly before and after each use.