You can remove the heater cover (when unit is totally cool) and grasp the element... and see if it will
allow itself to be raised up some.
Warmup could take 5 minutes up to ten depending.
The element does not die, but the red hot part can eventually move toward the top of the element.. as opposed to being the entire top half of glow.
The heating element should be much closer to the top of HC than 1/4 inch.
Try again, to raise the element if you are willing.
While I figure you have done all of this, I mention it anyway.
Twist the element clockwise and counterclockwise as you attempt to lift it.
Try to further adjust the wires, any knots or bends to see if you can lift element at all.
ALSO... check the knob.......
See if the glass knob is restricting how far you can adjust the Heater.
It can be removed and then put on again, in a more optimal position (if it was restricted)
Element itself is very sturdy: