Dust, particles of fabric and threads can collect in the machine mechanism and make it difficult to feed the fabric under the presser foot, and increase the load on the machine drive. For efficient operation of the machine, it is necessary to regularly clean it.
First of all, the machine must be disconnected from the power supply, and also for safety and convenience, it is better to remove the needle.
The needle plate must be unscrewed, the shuttle dismantled according to the instructions for your machine. It sounds complicated, but in fact, after the first cleaning, you will understand that no special skills are required here.
First of all, it will be necessary to clean the dust from the niche under the needle plate, the shuttle and the bobbin case, since the dirt mainly accumulates there.
Dust is removed using hard and soft brushes, while for small and complex parts like a shuttle a soft brush is preferable. Wound threads and large pieces of fabric can be removed with tweezers, and it is convenient to pick up dust accumulations in the corners with a needle (use its blunt end to avoid scratches on the mechanism).
Another rule of care when cleaning: do not use a damp cloth. Oil and dust can be removed from parts only with a dry cloth, otherwise rust may form.