JD, When fully up to temp the pan will have a slightly amber colored fluid in it, no globs of unmelted salts.
My burner is rated at 10,000 BTU,under a round stainless steel dog dish.
When first immersed in the salts it will congeal on the part due to its lower temp,preheating the part will help reduce this. As it comes up to temp the salts will melt back off and bubbles may appear, these must be dislodged or they will cause spots. Any oil on the metal will cause splotches. The gunk after quenching is congealed salts that will rinse right off under warm water. HTH Robert

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