How to remove a mark set by iptables?

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http://serverfault.com – I'm setting marks with iptables like this iptables -t mangle -A POSTROUTING -d -j MARK --set-mark 10 if I want to clear what I do is remove all with iptables -F iptables -X iptables -t nat -F iptables -t nat -X iptables -t mangle -F iptables -t mangle -X iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT instead of removing all the rules to clear this, how to remove a mark only? (HowTos)