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So I'm pretty sure I have some 'gunk' in my nozzle - what's the recommended way to clean it? On a nozzle without a PEEK tube I'd just hit it with a blow torch...

If it's ABS, just soak it in acetone.

Jimustanguitar wrote:If it's ABS, just soak it in acetone.

Nope... PLA...

I'd like to know what dissolves petg, that also won't dissolve my skin!

barry99705 wrote:I'd like to know what dissolves petg, that also won't dissolve my skin!

The only thing I know of is to wear chemical resistant rubber gloves when using these wicked , skin and lung burning chemicals.

Methylene Chloride. It's one of the fairly common hobby solvents. I suggest getting it in the "Flex-i-File" branded bottles, as that is about as pure as you can reasonably get. Use a syringe or similar to fill the nozzle. Use the tip of the needle to push it in, and then use the pressure of the needle to slide it out (Along with a small amount of pressure from the solvent). It will not eat your skin, although it does feel really cold. Use it only in a well ventilated area, and wash your hands before eating, or touching any mucus membranes afterwards. You can get high on it, but it's an unpleasant one, and it has some other interesting properties.

Xenocrates, thanks for the info!

But I found the problem...my knurled wheel is all smooth down the middle - no bite on the filament! Ordering a replacement...

I'm cleaning hot end many time with my old underwear.
It helps me every time

darkjorik wrote:I'm cleaning hot end many time with my old underwear.
It helps me every time

As I have noticed many times, this forum does not have much of a sense of humor but I thought it was funny! (of course I have a sick sense of humor!)

Eaglezsoar wrote:(of course I have a sick sense of humor!)

Have you tried giving it an Aspirin?

I'm serious.
It's not a humor

I now know you are serious, I just took as aspirin - as suggested.