So I took delivery of an OONI Koda 16 propane fired oven recently and first night baking I realized it was tough to clean the residual scorched peel dust from the hearth after a bake to prep it for following bake. I ended up using my peel to push it all to the back of oven and would clean it out the next day when cooled (that involved pulling the hearth, pulling out the vacuum cleaner and shoving it in there, etc) Total PITA.
I looked at various brushes but concluded they wouldn't work well and also various charcoal/ash rakes that were $5 cheaper and absolute garbage with lousy reviews.
Then I found this little wonder... One-piece & solid stainless steel from Weber for $24. No rivets, no screws, no 2-piece pole to screw together with a rake attachment to attach. Small enough to fit in there all around, strong enough to use like a long chisel and scrape away anything burned on and it allows me to quickly rake the scorched dust and debris from all the way at the back of the oven to the front and out of it. It is 21" long with a 4" wide rake and a hair over 1 3/4" tall so it will fit in there all around. I can use it for my grill too (which is what it was really intended for). Wonderful little thing for anyone who has one of these little pizza ovens like OONI and others that ya can't fit much into to sweep and clean the hearth. This thing will outlast me and I'll just leave it hanging outside by the oven year-round. An absolute "must have" in my opinion if you have one of these little ovens.