How Do I Force Clear IP NAT Translations on Cisco IOS?

If you do this in IOS:

IR809-DM#conf t
IR809-DM(config)#no ip nat inside source static udp 9999 interface GigabitEthernet0 9999
And get this:
 %Static entry in use, cannot remove
Do this:
IR809-DM#clear ip nat translation inside forced
Another method. Print a list of translations:
# sh ip nat tran

Create this function:

  set $(echo $* | tr : ' ')
  echo clear ip nat trans $1 inside $2 $3 $4 $5 outside $6 $7 $8 $9

Copy/paste the translation you want to clear as the parameters to the command:

$clearnat udp
clear ip nat trans udp inside 20099 20099 outside 58114 58114

Copy/paste the command into the IOS command shell.