Certain phrases can have serious unintended consequences. A customer brings in her machine and proudly announces, "My machine has worked great for years, I have never even hand to had it serviced." The patient technician bites the tongue, because they know serous problems lie ahead. Neglect is the enemy of every sewing machine. Inside the machine expect lint, debris, dirt, grime, and worse. Fact, the oils in a sewing machine deteriorate over just a few months. Within a year they turn sticky and eventually harden like plaster. Neglect kills machines. Neglect shortens the live of a machine. Therefore, maintain your machine in peak conditional at all times. It will last almost forever if you do.