If you are tending the fire, aerating it, just plain doing fire maintenance; you shouldn't have meteorite sized klinker. If you are working the fire, the klinker will stay small and be worked out through the klinker breaker.
If you don't have a klinker breaker, such as my 2 portable re-enactment forges, by tending the fire you remove the klinker while they are still small and not robbing the heat from your fire.
Also if you are getting really large klinker, you could have a coal quality problem.
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