Hello everybody,
we have an important update regarding ckSepoliaETH (see below). I would also like to thank everyone who tried out ckSepoliaETH 
!
Update on ckSepolia ETH
Summary
We will re-install the ckSepoliaETH minter(jzenf-aiaaa-aaaar-qaa7q-cai) and ledger (apia6-jaaaa-aaaar-qabma-cai) from scratch and start scrapping Ethereum logs from the latest finalized block at time of re-installation.
This will effectively make the ckSepoliaETH minter forget about all past transactions and all accounts will be reset to 0 ckSepoliaETH.
We encourage people having ckSepoliaETH to make the necessary withdrawals until Friday November 17th 23:59 CET to an Ethereum address of their choice if they wish to keep their Sepolia ETH.
Why?
When we released the URLs to play around with the ckSepoliaETH minter and ledger, we did not have yet fully implemented the minter’s stable memory that is necessary to keep track of all deposits and withdrawals across upgrades. We thought (and we still think) that it was best for people to try a not yet feature-complete version so that we can receive feedback as early as possible. As part of the normal development process several re-installations from scratch already have been made: none of the recorded deposits were lost (because they originate from events that appear in the Ethereum logs that the minter constantly scraps) but previous withdrawals have been totally forgotten by the minter (the corresponding Ethereum transactions are visible here). As a result, the current minter and ledger state are incorrect (some accounts have too much ckSepoliaETH). Now that we are close to being feature-complete for the MVP we want to re-start the ckSepoliaETH minter and ledger with a clean slate.
We insist that this behaviour is not a bug, but part of our normal development process that is also visible from the beginning in the minter’s dashboard. As of now, the minter holds a bit more than 13k Sepolia ETH 
, so we thought it best to communicate transparently what’s going on so that users are not wrongly surprised.
What’s next?
So far everything is going according to the plan and the development is close to completion. Unless an unexpected major problem occurs, this should be the last time the ckSepoliaETH minter and ledger are re-installed from scratch. Afterwards standard canister upgrades (that preserve the state) may occur on a regular basis. We will add a new post once the re-installation was completed so that people can get back to playing around with with ckSepoliaETH.