清理乱账是整理和处理企业财务账目中出现的混乱、错误或不规范的情况，具体方法如下：Cleaning up messy accounts is the process of sorting out and dealing with any confusion, errors or irregularities in the financial accounts of a business, as described below:
- 审查和识别乱账 Review and identify messy accounts
- 纠正错误和调整账目 Correcting errors and adjusting accounts
- 整理分类 Arrange and classify
- 核对与调整余额 Reconciliation and adjustment of balances
- 重建账目和报表 Reconstruction of accounts and statements
- 清理历史乱账 Cleaning up the historical mess
- 建立规范和流程 Establishing norms and processes