Just to add a small pennyworth(?) of wisdom.  I have an old fashioned
glue pot, found in an antique shop!  I also have a defunct coffee
maker.  Once the glue is at the right temperature on the stove, I
transfer it to my workshop onto the coffee maker's warming plate.

The older the coffee maker the better.  The older ones tended to keep
the coffee too hot and ruin the taste.  However, for keeping the glue
at working temperature, they are fine.

Regards,
Nigel Perry