Cleaning the oven
There's no need for using any detergents, high temperature kills all the microorganisms.
We recommend to sweep ash out after every use. But always wait for the oven to calm before doing so.
Take the ash out of the oven with a rake and dump into a metal container. You can use it later as a fertilizer for your garden. Then use the brush to sweep the remaining ash out.
That's it! So simple.