I had my Pfaff Creative 7530 services only once - after a long move where it was packed and roughed around a bit. I never had it serviced again before the motherboard died. Motherboard is not affected by cleaning/servicing. When I opened it up to see if I could replace the motherboard the machine was spic and span clean. Fortunately I had already bought a second machine - a Pfaff Expression 2.0 which I use daily 8 - 12 hours. I clean it thoroughly about every 3 days, making sure I get ALL the lint out. I use canned air with the tube inserted down into the clear areas and pointed toward the feed dogs. When I squirt air the lint blows up and out the openings around the plate. This is how I cleaned the last one, and I will clean this machine the same way until it's computer dies. The secret to using canned air is to never blow down into the machine; always blow up out of the machine.