how to maintain the loopers?

To maintain the loopers in a sewing machine, first, turn off and unplug the machine. Then, remove any thread or fabric scraps that may have accumulated in the looper area using a brush or vacuum. Lubricate the loopers and other moving parts of the machine according to the manufacturer's instructions, using a high-quality sewing machine oil. Avoid using any other type of oil or lubricant, as this may damage the machine. Finally, test the loopers and machine by sewing on scrap fabric before starting your project to ensure everything is running properly. Repeat this maintenance process regularly to keep your machine in good working condition.