Typus save/edit form


I have some troubles with Typus form when I want to "Save and add new"
and I want to know
if there's anyone here that uses Typus.

What I want to know is how can I clean the fields of the form after
hitting "Save and add new"
I have a question_controller and inside I put this

  def new
    if params[:_addanother]
      _evaluation = @item.evaluation_id
      @item = Question.new

I was trying to render a new form, but I'm not sure if it's ok.
Somebody uses Typus?

Thanks in advance