# Sweeper (Balance Cleaner) Keep hot wallets lean and safe by automatically sweeping coins and tokens to your cold treasury. This page explains how the sweeper is started, how it decides what to move, and which parameters control its behavior. *** ### What the sweeper does * Iterates over **all active hot addresses** in the payment system, checks balances, and tries to move funds to **cold addresses**. * **Coins (native assets):** sent via a normal transfer; gas is paid by the sending address. * **Tokens (e.g., ERC-20/TRC-20):** require native coins on the source address to pay gas, so the sweeper first tops up a small amount of native coin to that address, then sends the tokens to cold storage. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.omypayments.com/overview/our-products/sweeper-balance-cleaner.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.