Fair Product

I bought this in hope of recreating a spa-like, aromatic atmosphere. This product can accomplish this, but only immediately after adding essential oils to the water. The strong aroma only lasts for about 5 minutes. It could be my oil to water ratio..., but I do seem to be going through my oils quickly. Directions and use are simple, but the size seems to be a factor? Any suggestions for a stronger scent for longer are welcomed.

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