I have a new Wolf 36" 4 sealed burner with griddle rangetop. Love it so far. Can anyone give me some advice on taking care of the griddle? I've seasoned it, but am curious about what to do before and after cooking. Do I grease the griddle beforehand? Do I wash with soap and water after? The instruction booklet is a bit vague. Also, what do you use your griddle for? Thanks!