I have been making my own soap for a few years now and it works better than any commercial brand. I use cold water for most of my washing and no problem with dissolving. I have gotten so many people started on this. Costs less than a penny a load. Oh be careful with Oxyclean in it, i found it caused some color change in some clothes. So now I am careful what I add it too. I do it as a booster. If you have a front loader it works great but only use one T. Enjoy and think about how money you are saving!!!!!