Can drinking hot water before meals help your liver?

I have read about having hot water when you get up will help you clean your liver. Would it be a good idea to have hot water before a meal to help the liver for digestion?

Also. I know coffee it´s not good. Can, let´s say,four cups of instant coffee (no more than 1 per day) do you harm?

Thanks a lot for your help.

:-)