When the warranty is out I take my machine apart, even my Bernina. The computer part is sealed so I leave that alone. The Bernina dealer wouldn't let me watch (I don't take no as final) the repairman take my Bernina apart sooooooooo I called the the guy and asked if he knew anyone for a private maint. instruction. He said sure, me! He came to my house and showed me step by step how to take the housings off and do a good cleaning on all my machines. I took a FW maint. and repair class at a quilt show one year. I learned so much from that class.