<https://community.ultimaker.com/topic/19249-how-to-tell-when-the-ptfe-coupler-is-bad/#comment-186768>
<http://schema.org/text>
"Update, turns out it was the nozzle. Some how it got so clogged that I couldn't even blast out the gunked up material with a torch. Soo... I grabbed the smallest drill bit I have and made myself a 1mm nozzle. Prints faster than ever now  "
<https://community.ultimaker.com/topic/19249-how-to-tell-when-the-ptfe-coupler-is-bad/>