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You may want to check your dough recipe. The stone is usually much hotter than just 500 degrees. Most commercial or homemade dough have a higher sugar amount and will burn right up. Look up a neapolitan pizza dough recipe and try that. It uses just flour, yeast and salt. I have great success with these types of dough without the burning. You can try higher in the dome, rubbing with a damp rag, different hydration levels etc....I think the best combo is high in the dome with a good high temp dough.
My Ex did the same thing, never once opened the lid. When it came down to splitting property and money, it was included and deducted from what I had to pay her. Instead of fighting for it, I decided to buy one the B@#CH never ate off of. Just wished I wouldn't have tightened the bands that one last time. Oh well, the reason why divorce is so expensive is because it's worth it.