I just accumulated 15,000 satoshis, which was the original Minimum Withdrawal Amount when I started using your faucet. However, I also just checked the description text of withdraw, and found that the Minimum Withdrawal Amount is now 20,000 satoshis.
Did you raise the Minimum Withdrawal Amount these days?
minimum weekly withdrawal : 20,000 satoshi , maximum : 150,000 satoshi.
minimum manual withdrawal : 150,000 satoshi.