Last feeding?

Shielded Immersion Heater

Heater has to be fully submerged in the syrup

This pail of corn syrup was granulated, You can see the granulation in the bottom of pail. One hour of heating, and it was clear.

It is getting late, very late. When it is getting chilly out the bees don't take the syrup very well. They don't like cold syrup.
When I have to feed late in the season, it is important to give them warm syrup.
The easiest way to heat syrup is an immersion heater.
I use a 120 volt heater. It is made to drop it in the syrup. It is not to be used with honey, as it is not food safe.
The syrup warms quickly, caution is required not to leave it unattended when in a plastic pail.
The warm syrup is put on the hive and is taken down very fast by the bees.