All needed information you can find here.
How long does the mixing process take?
You need to wait up to 3 confirmations of bitcoin network.
How long is incoming address valid for?
For every destination address you will get new mixing address, you can use this address multiple times.
What logs do you keep?
We do not store any information that can be used to identify the users either. All logs are wiped out on a routine basis to add to organizational efficiency and security of the users that rely upon us to maintain their privacy.
What is your fee?
We don't take any Fee only bitcoin network fee 0.0001 BTC.
What amount I can mix?
Cleanbit uses Coinjoin mixing system, so you can mix any amount of bitcoins. Large amounts can take some time to finish, because you need to wait other users to mix such amount.