Hey There,
Before operate or use any kind of trimmer you need to wash and dry your hair for better cut, and also maintain the trimmer level for get better stylish shape of your hair. dont forget to put your hand steady and focus on the mirror. Always try to clean the trimmer using brush, and do not wash your trimmer with water, it will damage the thickness of your trimmer blade. if your trimmer have battery than keep the charge level full before use to get better cutting.
hope thus tips will help you