Nevir NVR-2202 S-ION Instruction Manual page 19

WARNING: Never immerse the hair dryer in water and always ensure
that plug is kept dry. After a while of use, you should take the inlet
apart and clean it .Operate method: turn the inlet toward to
opposite clockwise direction, after cleaning it, turn toward to
clockwise direction and fix it upon the hair dryer. Frequently clean
our any hair or fluff that becomes stuck in the inlet filter. To clean
may result in overheating.
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