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.