Why every swap leaves WETH behind
The short answer
Most decentralized exchanges don't trade ETH directly β they trade WETH, wrapped ETH, an ERC-20 version of ETH that smart contracts can handle easily. When you swap, the router wraps your ETH, trades with it, and sends change back as WETH instead of unwrapping it for you. Rounding and minimum-amount rules leave small WETH balances behind almost every time.
Why contracts prefer WETH
Native ETH doesn't implement the ERC-20 interface, so a swap contract that wants to support both ETH and token pairs ends up converting ETH to WETH at the door. It's simpler, uniform code β and it's why WETH exists at all. The wrap is 1:1 with no fee: 1 WETH is always exactly 1 ETH.
Why it adds up
A single swap might leave 0.001β0.01 WETH. Active traders stack dozens of these remainders across chains β wallets routinely hold $20β200 in forgotten WETH after a few months of trading. On chains like Base, Arbitrum and Robinhood Chain, where trading is cheap and frequent, it accumulates even faster.
Getting it back
Unwrapping is a single call to the WETH contract β no swap, no slippage, 1:1. ClaimYourETH finds every WETH balance across Ethereum, Base, Arbitrum and Robinhood Chain and unwraps them back into your spendable ETH balance in one signed transaction.
Check your own wallet
See what your trades left behind β across Ethereum, Base, Arbitrum and Robinhood Chain.
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