Depending on the machine, you can do your own tune up ..As long as it seems to be running smooth. I worked in sewing machine sales and the tune ups were basically cleaning and oiling and lubricating the gears if you have gears. ( and yes they charged upward of 100 dollars) There are many blogs on the net telling you what to do. The instructions may be in instruction book that came with your machine. Along with the brush that comes with most machines i always have on hand pipe cleaners (bent they can get into small areas) and new make up brushes along with cotton swabs. Be careful with the swabs tho that you do not inadvertantly leave cotten in the machine.