Should thermistor be loose in hot-end?

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An article that was brought up just recently.
You might find it useful.

Whats wrong with this picture - printre hot ends

So was swapping hot ends to a different nozzle diameter and noticed the thermistor bead is just loose and in poor contact with the heat block. Same on all the other extra hotends I bought. Surprising given the quality in the rest of the machine. [109375272_397826987842118_4136456159319195283_n] So Id recommend some epoxy or high temp stud thread lock…