Which of the below is NOT a recommended maintenance technique for handcuffs?

The maintenance of handcuffs is critical for ensuring their effective and safe operation. Typically, handcuffs should be cleaned and maintained to remove contaminants and prevent rust or wear. Recommended techniques include soaking them in soap and warm water to remove dirt and grime, using a professional cleaning solution that is specifically designed for metal or tactical gear, and regularly lubricating the moving parts with oil to ensure they operate smoothly and effectively.

The use of a dishwasher or washing machine set to high heat, however, is not recommended. This method could potentially damage the handcuffs. High heat can warp the materials or cause unforeseen malfunctions, especially in plastic or composite components. Additionally, dishwashers and washing machines might not adequately clean all the crevices where dirt and grime can accumulate, and the harsh detergents used can be detrimental to the finish and integrity of the metal. Therefore, this maintenance technique is not advisable compared to the other options that prioritize thorough cleaning and preservation of the handcuff mechanism.