turn the box back over and use your hive tool to pry loose one of the top bars. again, a frame lifter hive tool is excellent for this job, since the lever-end can easily pull the bar straight up and loose from the box.
then, carefully remove the top bar with the comb attached.
use your hive tool to cut the comb from the top bar and into the top bucket of the strainer.
cut the comb into several pieces as you do this.
scrape the top bar down to the wood on each side of the comb guide.
as you continue to remove top bars with combs and place the combs into the strainer, 