Hello everyone. On Father's day my wife bought me my first string trimmer. It was a Sthil. I also use the Motomix premix fuel and oil in it. Do I need to do anything to it such as dump the fuel out and run it out of fuel? Do I store it empty or full of Motomix in the tank? Do I pull the spark plug and add a drop of oil to the cylinder or anything? Thanks for the help.