Did I break my hot end?

[Geoff]

I was thinking of welding it or even using the cement stuff some people use to secure their thermistor but I need to find out why it's clogging up with filament, you got any idea why it's doing it?

is it clogging to the point of pushing that off is it? that's a bit different, as it's got unnatural force on it, apologies if I missed that in your first post.

Have you got some electric guitar string? light gauge?

There are two things that would probably cause that sort of blockage to the point of forcing it out (and you must have some good filament to not shred itself before that happens!) so it's either a blockage or for me, when it's that bad generally I am not printing hot enough for that particular filament.