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120ml (4.1 oz) Ultrasonic Humidifier Aroma Diffuser EL-5501
Brand: Generic / OEM
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Audited BOM: 10 Components
RMA Chain & Defect Intelligence
Root cause causal graph linking factory engineering flaws to verified consumer return reasons.
⚡ Causal Link: Defect to Consumer Return
The use of essential oils, even water-soluble ones, attacks the piezoelectric material of the ultrasonic transducer, causing premature failure. This leads to the loss of humidification and diffusion functions, resulting in RMAs and consumer complaints.
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