Crypto Wallet Drains Every Time I Add Gas: What It Means
If a wallet loses funds every time you add gas or a small amount of the native coin, someone almost certainly has its private key or seed phrase and is running a sweeper bot. The bot watches the wallet and grabs anything that arrives, usually within seconds. Topping up again only feeds it.
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Stop sending anything to that wallet. When funds vanish right after you add gas, the wallet's key is almost certainly compromised and a bot is sweeping it. Treat the wallet as permanently unsafe, create a new one on a clean device, and only consider a rescue for remaining tokens with an experienced, trusted helper.
What a sweeper bot does
A sweeper bot holds the stolen private key and watches the address on one or more networks. The moment native coin arrives, it signs a transaction sending it straight back out, often paying a higher fee so its transaction lands first. Bots often watch the same address across several EVM chains at once, because one seed phrase controls the address everywhere.
Why adding gas can trigger loss
Some tokens cannot move without native gas. Once gas is added, a malicious actor or bot may use it to move tokens away.
Signs the wallet may be compromised
Warning signs include unknown outgoing transactions, funds moving shortly after deposits, unknown approvals, or a seed phrase that was entered into a suspicious site.
- unknown outgoing transactions
- funds move after adding gas
- old suspicious approvals
- seed phrase shared
- wallet used on scam site
What not to do
Do not keep sending gas to test the wallet. Each new deposit may give the attacker enough fees to move more assets.
How rescues are actually done
When tokens are still stuck in a swept wallet, for example staked or vesting tokens, experienced rescuers use private transaction bundles, such as Flashbots on Ethereum, to fund the gas and move the tokens in the same block so the bot never sees the gas arrive. This is technical, easy to get wrong and only worth it for meaningful amounts. Never give your seed phrase to someone offering to do it for you; that's the most common follow-up scam after a sweep.
What to do instead
Stop using the wallet for new funds and save the transaction hashes. From a clean device, create a new wallet with a new recovery phrase; don't import the old phrase anywhere. Check whether the loss came from an approval rather than a leaked key: if outgoing transfers were made by a contract using an allowance, revoking it may be enough. If the transfers were signed by your own address, the key is gone.
Decision rule
A wallet that drains after adding gas should be treated as unsafe for future use.
Sources
MetaMask's revoking guide was checked on October 31, 2026. The Flashbots and FTC pages are general references for rescue bundles and recovery scams.
- MetaMask guide to revoking token approvals: https://support.metamask.io/more-web3/learn/how-to-revoke-smart-contract-allowances-token-approvals/
- Flashbots documentation: https://docs.flashbots.net/
- FTC refund and recovery scams: https://consumer.ftc.gov/articles/refund-and-recovery-scams
Be careful with websites that promise unrealistic rewards, ask for deposits before withdrawal, or require suspicious wallet connections. Small reward sites should never need your seed phrase.
FAQ
Why does my wallet drain after I add gas?
A compromised wallet or sweeper bot may use the gas to move assets out quickly.
Should I add more gas to rescue tokens?
Not without a careful plan. Adding gas can give the attacker the fee needed to move funds.
Can revoking approvals fix it?
Revoking approvals may help in some cases, but a leaked seed phrase means the whole wallet is compromised.
Should I keep using the wallet?
No. Treat it as unsafe for future funds.
Can someone rescue tokens from a swept wallet?
Sometimes, using private transaction bundles that fund gas and move tokens in one block. It needs real expertise. Don't hand your seed phrase to anyone offering this service unprompted.