This is my first spring with my bees. I amconsidering vaporizing oxalic acid. I have read on this forum that the oxalic need to go from the solid crystal to a gas without changing into a liquid first. I am having trouble getting it to do this. I have made several trial runs, with different on and off timings, but have not succeeded yet. I am using a homemade vaporizer I saw on this forum. I would appreciate any suggestion.