This glitch allows the player to use the death machine killstreak over and over again but only works in private matches. Follow the steps below:

1) Start a private match with killstreaks on.
2) Obtain the Death Machine killstreak.
3) Once you have the killstreak, change your team to "CodCaster".
4) Change back to your original team. (Should be either Seals or Mercs).
5) Once you run out of ammo the killstreak will not disappear and can be used again.

This is a fun glitch that can be used to annoy and confuse your friends.

If you are having any problems watch this video tutorial: