There is some dust on the ceiling outlet or on the ceiling near the outlet.This sometimes happens, usually as a result of dust already in the home being attracted by static electricity due to the drier air from the DVS brushing against the outlet or ceiling surfaces, and by the flow of air within the region of the diffuser. Clean the surfaces with a clean dry cloth, brush, or use the brush attachment on the end of your vacuum cleaner.
If the problem persists check your air intake filter to ensure it hasn’t become clogged and check the ducting in your roof space for any damage. Occasionally tradespersons or other people working in your roof cavity ducting can accidentally damage the ducting, allowing some dust from the roof cavity to enter your home, although this is not common.
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