Seal the entrance back up.Leave until all the oxalic acid has vaporised(a few minutes)and remove.Leave sealed up for a few more minutes and then remove the foam bung from the entrance.Product Name:Bee Medicine Fumigation These electric vaporizers are used for bee colonies treatment with the acid vapor(an acid of sorrel,formic acid).It is a perfect decision for the treatment of bee colonies in the hive with formic acid vapor or other medicines to create favorable conditions for them annually.Made of a aircraft stainless steel+wood Seal the hive to keep in the vapour,normally with a foam bung at the entrance.Add the correct quantity of Oxalic Acid(as detailed on the container)to the cup of the vaporiser.Connect up to a 12V car battery and slip the cup of vaporiser into the centre of the hive through the entrance. It comes.Top Quality Vaporizer is made for a long-term service. Product weight:1060g,Product specifications:12v150W,Product introduction:Export type bee is easy to use and easy to operate, Manufacturer: Mcnhbdgg