I’m surprised you can’t smell the lavender :/ It’s usually pretty strong! Is your oil burner working? And I can see no reason to not be able to re use the same water more than once. Might increase the smell

I put water in burner bowl then add drops one by one,light or heat and if not smelly enough add another drop. hope this helps

I have a candle oil burner and use water with the essential oil. Maybe you need to add more lavender to the water? And sometimes, I can’t smell how powerful the aroma is when you’re around it all the time and other people enter the house and say how strong the smell is. Maybe try another variety of oil?

Just make sure there is always water or oil in it. Use as much oil as you like for the aroma. Hope this helps

when I put oil in a burner, I put oil and nothing else, the aroma is fantastic, en just keep topping it up when it gets low.

You can reuse the water, and the 6 drops is just a guide, put as much as you want or need In there.