Describe the setup
Include the exact model, country, water source, room size, settings and length of ownership. Photograph your own device and remove addresses, serial numbers and other personal details you do not want public.
Explain each score
Describe refill handling, cleaning, control usability and replacement-part experience. Separate a delivery problem from a product problem. A review is useful when readers can understand why you reached a conclusion.
Disclose relationships
Say if the item was a gift, loan, discounted purchase or provided by a business. Do not invent measurements or present marketing claims as personal testing. Other owners may have different conditions and experiences.