Here's a quick trick to reducing hotspot. Usually if the flash or strobe is not diffused enough a hotspot can appear. This could also appear if the model has oily skin. If you shoot out door during mid-day, the sunlight could reflect back a hotspot. I created a quick 2 minute video on how to reduce a hotspot.
1.) Duplicate the layer (Command + J) 2.) Select the Patch Tool 3.) Make a selection around the hotspot 4.) Drag or move the selection to another similar location 5.) Deselect the selection (Command +D) 6.) Lower the Opacity of the top duplicate layer to around 30% - 50%
Great advice! I have used clone tool or healing brush on the second layer, masked almost everything out except little soft area around the hotspot, and then lowered opacity of that fixed layer. I will try your method too.