I misunderstood how this product worked - I have a traditional wooden hive so am not happy spraying a wet solution onto the wood and also I do not want to wet my bees with the solution. I thought the liquid concentrate was going to produce 'smoke' once mixed with water but sadly this wasn't so. I can however see it may be better used on the plastic 'Omlet' hives. The liquid concentrate certainly smells like smoke though! I will be interested to hear of any other bee keepers experience with this product.