You can speed dry the clay in the kiln if you turn the kiln on low with the
lid completely open. You will run into problems with blowing up if the
internal kiln temperature goes over 212 degrees which is the boiling point
of water. So long as you don't go over 212 degrees until your pieces are
bone dry you won't have a problem.
Fire the kiln slowly after leaving the pieces in the kiln on low.
Sometimes putting pieces in the window will cause the piece to shrink in an
uneven way and you will have warping. This may also occur with a fan
pointed in one direction.