Great...while they lasted

Bought these in late April. I liked them so much that I bought a total of 5. As of August, none of them work. They just stopped working. None of the diffusers must anymore. I tried deep cleaning them in hope that would work, and still nothing. Guess they had a good run considering I bought them in April and used them ever day, but disappointing I spent all that money on 5 of them just to have them all stop working 4 to 5 months later.

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