Possible Causes：
Residual chemicals from production. （Under normal circumstances, the odor will disappear naturally in a few days.）
Improper storage (e.g., humid or enclosed environments).
Accumulation of sweat, oils, or dust during use.
Step-by-Step Solutions ：
Gentle Cleaning：Wash the hairpiece with mild shampoo and cool water. Avoid rubbing vigorously.
Add a few drops of white vinegar or baking soda to neutralize odors (optional).
Air Dry Thoroughly ：
Lay the hairpiece flat on a clean towel in a well-ventilated area, away from direct sunlight.
Deodorizing Spray ：
Lightly spray with fabric or hair-specific deodorizer (alcohol-free).
Storage Tips ：
Store the hairpiece in a breathable storage bag with silica gel packets to absorb moisture.
Preventive Measures ：
Clean the hairpiece regularly based on usage frequency.
Avoid exposing the hairpiece to smoke, strong perfumes, or humid environments.