What should you avoid when dealing with wet chemical extinguishing agents in firefighting?

When dealing with wet chemical extinguishing agents in firefighting, it's crucial to avoid subsurface injection of agents into hot cooking media. This method can be hazardous because injecting a wet chemical agent beneath the surface of burning oil or grease can cause the hot liquid to erupt violently. The superheated cooking media can expand rapidly, leading to splattering and potentially creating a fireball that could spread flames and cause injury.

Wet chemical agents are specifically designed to respond safely and effectively to cooking fires, especially those involving oils and fats. The proper application method is to discharge the agent from a safe distance above the burning surface, allowing it to form a blanket and extinguish the fire without introducing the risk of causing an explosion or flare-up.