A trader learned that, in order to exchange Ethereum tokens (ETH) for Wrapped Ethereum (WETH), they should send their ETH to the WETH token contract and receive the WETH in return. Intending to convert WETH back into ETH, they erroneously assumed that it “works the same way backwards”. The trader sent 195 WETH ($510,000) to the WETH contract only to find they received no ETH in return, and their money was lost forever.Transaction history on Etherscan shows they were the 265th person to make this mistake. Most people did so with far smaller amounts of WETH, although another unfortunate trader lost 115 WETH (at the time valued at $360,000) on August 11, 2021. A total of 432 WETH has been irretrievably lost to this contract this way since July 2018 — currently valued at $1.1 million.