Okay so I have a recipe that is not food it is cleaning supply. I found it on pinterest and decided to try it. We have hard and very silty water so my bathrooms didn't look clean after I cleaned them. I have tried everything I can think of on my faucets and shower door but nothing was working. I even tried the baking soda and vinegar paste and it didn't even touch it. I finally tried this stuff and it worked amazingly. I went on a cleaning spree when I realized it worked. Sorry, I am just a little excited to have found this. You have to try it!
12 oz white vinegar
12 oz dawn dishsoap (the recipe says blue dawn, probably to make sure you don't us it as water, but I used clear)
Heat the vinegar in the microwave until it is very hot then add the dishsoap put it in a spray bottle and start cleaning. It doesn't have to be hot when you use it.