Why do white spots appear when I melt UteE (ultra thick embossing enamel)?

White spots appear as I merge onto the UteE cardstock. I tried to use less heat, making sure that I am moving around the gun, so I can find anything on the Internet. The white spots are permanent and can not be deleted. They are not as high UteE clear when melted. The UteE is a new bottle and not mixed with other embossing powder.

Never heard of this happening. Do the white spots remain after you melt UteE gift? The only thing I can think is that there are some white powder in the embossing UteE

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