This cheat only works when you have less than 30 seconds from finishing a troop upgrade an a full army. About before thirty seconds, cue up the troop you are upgrading. Don’t forget before you do this you have to make sure you have a full army. After the upgrade finishes, untrain the troops. Now, you will get free Elixir!
How to save your elixir when your offline
To be able to save your elixir where people won’t get that much elixir. Just make sure your camps are full and then fill your barracks up with bombers then you can get offline with like only 100,000 elixir instead of 300,000 elixir. Get back on, then unload your barracks first thing and then you will get all of your elixir back.