The most efficient method of administering Oxalic Acid treatment to bees to fight off the varroa mite.

The procedure for use is:
During a period of cold weather in the winter:
Seal the hive to keep in the vapor, normally with a foam bung at the entrance.
Add the correct quantity of Oxalic Acid (Api-Bioxal) to the cup of the vaporizer.
Connect up to a 12V car battery and slip the cup of vaporizer into the center of the hive through the entrance.
Seal the entrance back up.
Leave until all the oxalic acid has vaporized (a few minutes) and remove.
Leave sealed up for a few more minutes and then remove the foam bung from the entrance.