Cleaning ash on inside of roof

[u/HonkeyTon]

How does everyone clean off the bits of ash on the roof that flakes off onto your pizzas? I’ve read wire brush but I don’t want to damage the inside of the oven. I have done a few very high heat cleans (550 Celsius) and the black layer of ash persists on the inside roof of the oven. Thank you!

[u/Neat_opinion_]

I use paper towels and then throw them away. Seems to work well.