HI All, following the suggestions a while back, I looked into
"wax warmer" units.  I found one on eBay for a little less than $25.
It has an on-off switch and a temperature knob. The "glue pot" is
removable, and it includes a lid for the "pot".  While I haven't put
glue in it yet, I did fill it with water and it was able to hold
140 degrees.

There's a whole variety of "wax heaters" for use in hair removal,
etc.; I never would have thought to look there.  I think this will
be better than the min-crock pots I've been using.  Are any others
out there using these?

David Dewey