I never have. As long as they sew I do the cleaning and oiling myself. Now that I have a really nice Janome that I won at Threads of Time in Danville, Il. at their customer appreciation days I might have to start letting Bill check it out now and then but with the cheapies I've had in the past I just got different machines when they konked. A cheap portable would usually last me around two-four years of hard, hard sewing. That was okay with me.