Hot or cold water when washing hands?

So, I went and found a questionable fact that stats: when washing ones hands, using hot water is no different then cold water. And using hot water is just a wast of energy. So I googled it, and found this website: This is the website. It stats that: in order for hot water to kill bacteria, it would have to be hot to the point that it would scald our hands. It also clams that using hot/worm water will actually increase, and welcome bacteria.