After this I cut the door using a bread knife. It needs to be just under two thirds of the height of the dome. Get your hands in and scoop out the sand. There's lots of it! I had sand still clinging to the roof (some of which came out after firing), hence the plastic bag would have helped. Basically I had to cut it out with a machete and my fingernails (until I found mud), until it was gone. From what I read earlier, a slow drying out is neither here nor there, so I decided to fire it. Swept up again round the yard to get fuel and started to fire it. Basically this means lighting a fire on the front, waiting till its good and going, then sweeping it into the hole. This means for an oven this size, about three to four modest fires lit, then swept in.
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