Potassium chloride (KCl) buildup on a metallic nozzle at temperatures above 750°C presents a challenge for removal. Dissolving KCl in warm water is ineffective at such high temperatures, and steam injection may offer a potential solution. The discussion raises questions about whether KCl is a byproduct of the process and if it can be removed before reaching high temperatures. The temperature and cycle time of the jet, as well as the specific industry context, are crucial for addressing the issue. Similar challenges are noted in molten salt baths used for heat treating metals, and cooling may help shed KCl if the nozzle's temperature coefficient differs from that of KCl.