Hi Anthony - i use a timer with my Silvia and fire it up about 3/4hr before i get up. Have been doing this for a few years, no problem - just ensure the steam valve is properly closed and Silvias switches are set correctly. If I forget to put timer on, I turn Silvia On and when heated, flick on the steam switch to try and speed things up a bit - this sort of works, but isnt perfect.
After steaming milk for a latte, I leave the steam valve open a bit blowing steam on a cloth or into a container whilst pouring the milk and serving. I then come back and run water through the steam wand. I then do a water flush through the group. Once again, not perfect - but not bad.