Make sure you use the coin control features and change the custom address to your AD address when sending out coins to avoid the change being sent to a random address (within the wallet).
And if you think coin control is too complex/confusing, just send 0,001 PRIV to the address mentioned (without using coin control).
Then check
https://explorer.privcy.io/ and you will see that your coins are no longer in your airdrop address (this is intentional, your change just moved to a new address in your wallet).
Then transfer all your PRIV back to your airdrop wallet.
To be extra safe, always check your wallet balance on
https://explorer.privcy.io/ afterwards.
Coin control is really simple to use, its always good to learn about this now anyway as it will help improve the ability to stake if your blocks are in the correct sizes.