In article ,
" wrote:

ER doc posted about the Rival Hot Pot Express a few years ago that has
a dial for maintaining heat at less than max. Mine was at a drug
store for $15.00USD.

That is pretty much what I am using. However, the elemen is on the
bottom; this means until the water bath gets up to temp, the bottom
element will be quite hot, running the risk of overheating the bottom of
the glue container. So I just let the water get to temp first and then
the element runs in very short cycles.