Connect to Kine Staking dApp, click "Burn", note that you have to wait for at least 45 min to burn debt after minting kUSD.
Input the amount kUSD you want to burn, and then click "BURN". "Max" will burn all your kUSD balance or 100% debt.
Once the transaction is approved and mined, your debt value will decrease by the kUSD amount you have just burned.
Click "Add" to manage your staking assets, and highlight "WITHDRAW".
Enter the withdraw amount, "Max" will fill all of the staking asset available for withdraw, up to the amount that your outstanding debt allows.
Approve the transaction and wait a bit, your wallet balance will increase by the amount you just withdrawn.