Done this many times. Remove stone to driveway or roadway , rake out the stone depending on moisture use a hose or a blower, rake the stone around again, repeat till clean , return stone to the new ground cover.
When paying employees by the hour, trucks , tools, insurance, etc, I have to charge more to clean it, than to remove it and replace with fresh clean stone. Don't forget all the stuff you cleaned out of the stone doesn't just disappear.
Each 10x10 area will be 27 cubic feet. 4 cubic feet is around 350 pounds in a wheel barrow, so minimum 7 wheelbarrows per 10x10 area, if you are in GREAT shape, and have a commercial grade wheelbarrow. Then 7 wheelbarrows back to replace.
You actually have a common situation. The frugal fix, is to top dress with more stone, or mulch.
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