I only wash before storing if I detect unpleasant odors (smoke, musty, etc) or if it is stained or otherwise dirty.
If I wash it I dry it. Occasionally I will send something though the dryer instead of ironing.
Don't use starch.
Will often iron before cutting to get out fold lines from storage.
Rarely pre cut although I've been known to create my own jelly rolls or additions to jelly rolls. Do not cut scraps into smaller pieces until I'm ready to use them.