It might be hard to get a true balance as from the 1st Jan many utilities went up. I used to wash every second day and I now wash about twice a week. My machine has a few levels so I don't have to use a lot of water if I don't have a large load.
Also we use the washing water on the garden so we save by not having to water.
Its a hard balance as Mt Washmore is a pain as is Mt Foldforever.