Cleaning the Little buddy heater is relatively easy and essential. So, to clean the heater, you need to first remove the propane cylinder and the plastic service panel by removing the screws from it. If you find any dust inside it, you can use a vacuum cleaner or compressed air to clean it from inside. Also, you can clean the pilot tube with a pipe cleaner if you find it dirty. Once, it's done, you can put the screws back and attach the panel.