Does the oven become a hiding or breeding ground for cockroaches etc
I suppose they get cremated when its fired up again if so
Nah, after the pizzas are cooked you leave the coals burning, spread across the floor.
By the time the thing is cooled down there is just ash and a few lumps of coal and not a trace of food anywhere. Burnt to oblivion.
One of the best things is the fact they are self cleaning. If some cheese or topping goes AWOL, simply rake some coals over the area for 5mins, and push back, and you are back to a nice hot and clean cooking surface again.