The first part of Chuck's advice is right on (Turn the prop clockwise). This gives the prop a "Running Start" before it hits the compression.

But do NOT get in the habit of spinning the starter first and then jamming it against the spinner!

Just press the starter firmly against the spinner and hit the switch.

As far as having melted your spinner, welcome to the club! There are not many plastic spinners that don't have that little ring around their noses