Check for any disabled KMS Customer Master Keys in your AWS account and remove them in order to lower the cost of your monthly AWS bill.
1. Sign in to the AWS Management Console.2. Navigate to IAM dashboard. 3. In the left navigation panel, click Encryption Keys. 4. Select the appropriate AWS region from the Filter menu: 5. And check for any disabled customer master keys under the Status column: 6. Select the disabled key: 7. Click on the Key Actions dropdown menu and select Schedule key deletion: 8. In the Schedule key deletion dialog box, under Waiting period (in days) section, enter a value between 7 and 30 (days) and click Schedule deletion: 9. The selected key status should change into Pending Deletion: