Today I learned, while trying to clean a clump event and other plastic on my Hardened steel nozzle, that you shouldn’t heat it up whole in an oven. It will change colour (probably heat treat), get crooked by turning the shaft around the heat dissipation and the magnet will demagnetize.
So trying to do a good thing, it just cost me a nozzle.
You want to get something called a “hot air rework station”. Basically a high temperature air “wand” that lets you direct hot air in a controlled way at very small areas. They’re used for unsoldering and resoldering surface-mount electronic components on circuit boards. Basically a soldering iron that uses hot air instead of a metal probe. With one of these, you can heat the plastic blob without much in the way of “collateral” heating to anything else.
Also good for melting ice in your freezer when someone leaves the freezer door slightly open for a day when it’s really humid weather. 
Lacking the funds or motivation for something like this, a hair blow dryer can usually get hot enough to get the job done, you just have to be a little more careful about what is being heated up besides the blob.
I hate to ask what temperature you set the oven to…
I was trying to get it to 250c aka Petg melting point, so 500F convection heat in my oven.
Got a nice brown straw metal out of it
That is a very nice color.
It looks kind of nice, put it in a display box! 
Maybe you can get BL to put out a Boucher Special Edition nozzle and give you a commission.
It honestly does, tho I prefer when it reaches the blue purple work harden colour
I agree, tho I can’t make the box until everything else is repaired.
(Ps my laser cutter too is out of commission due to a hardware problem, waiting it’s arrival in hopes it solves it)
