Stove Top Temperature Hampton HI200

[Supersurvey]

I understand the optimum stove top temperature is around 500-600 F. On my insert I can't access the stove top or liner.
I only have a small metal strip on the door where I have an Inferno thermometer. Any idea if a 500 degree door would give you a higher or lower stove top. FYI I had wild cherry with blue flames going but still got that buildup on the glass.

My manual only states to not let the body of the unit glow.

 

[Supersurvey]

Posted this morning. Thought I would bump to the top to try to get advice. Burning my last cord of 5 year old Hurricane Sandy wood at about 15 percent.