<p>PTFE tubes are typically delivered coiled up. And because they are quite stiff, they always want to spring back to their original curvy shape, making them harder to route properly.</p>

<p>Is there a way to straighten them out?</p>

I just plugged the ends of tube and soaked it in real warm water for 5 minutes then stretched it out on a table. That helped then the hard part I spooling it up against the arch and soaked it again. This seem to work the best.