Great to know! Thank you for the status report Robert.
I feel this would be a handy solution to have - no pun intended.
What is the major obstacle?
Is the chemistry really difficult or challenging? Or have just not enough experiments been done?
It seems like there are plenty of solutions for the ABS side of things - which I understand is a different composition - but it would be very handy to clean out these tips with multiple steps or serious rare/dangerous chemicals.
I'm afraid we're still at the nasty chemicals like chloroform stage when it comes to PLA and solvents.
Some people have had good success with burning it out and then rinsing in alcohol. I believe korneel made a tutorial on that a while back. I don't have the link handy right now but I'm sure someone else does.
You could also experiment with atomics with other materials like XT or Nylon, both will sometimes remove stuff that straight PLA wont.
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