If it still vapes well, by all means save it.
You can even wash them off if you like...give it time to air dry and do a few dry burns before using again. You can also use a lighter to torch off the wicks if you like. Pull the little silica head of if you want to torch them...and avoid getting any any rubber parts too hot.
Yes, if you like you can rewind those heads.
There are several
threads here on the forums discussing various materials and techniques.
Try a few keywords in the search bar: vivi nova, rewind, recoil, rebuild, etc...
Here's just one of many videos you can find on the topic:
A PBusardo Tutorial - Vivi Nova Cleaning & Rebuilding - YouTube
He shows his rebuilding technique at around 14min into the video.