Seems like my printers only get stupid when I'm running ear protectors. Saw this after dinner tonight, a big blob of PTEG stuck on the nozzle. Fortunately it did not ruin the fan duct, but unfortunately it covered the block with it's taffy like evil. There was also a dusting of white powder around the hot end and on the fan duct which I'm guessing is from the white pigment in the PETG. On top of the problem with the blob, the failure stuck a bunch of plastic firmly to the PEI sheet which took a half hour to clean up by itself using a razor blade and scotchbrite.
To clean this mess I heated it to 200°C and carefully used a long nose pliers with some paper towel twisted around the end and got the bulk of the mess off. Then I used a brass brush (again very carefully) to clean up the sides of the block - except for the side where the wires connect (too easy to short it there). Then I went back over it with some paper towels wrapped tightly around the long nose pliers and wiped up anything left. The silicone boot was a write off though, but I have some spares so when I got it back together it looked OK. Both the pics below are after pics, I was too busy cleaning up the mess and forgot to grab a before, but it was not pretty. Now trying this again, but with only one ear protector instead of a full sheet of them.
To clean this mess I heated it to 200°C and carefully used a long nose pliers with some paper towel twisted around the end and got the bulk of the mess off. Then I used a brass brush (again very carefully) to clean up the sides of the block - except for the side where the wires connect (too easy to short it there). Then I went back over it with some paper towels wrapped tightly around the long nose pliers and wiped up anything left. The silicone boot was a write off though, but I have some spares so when I got it back together it looked OK. Both the pics below are after pics, I was too busy cleaning up the mess and forgot to grab a before, but it was not pretty. Now trying this again, but with only one ear protector instead of a full sheet of them.
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