Hi Judy, here are some posts that may help... https://www.hometalk.com/search/posts?filter=diy%20cleaning%20toilet
this cleans anything except granite and quartz.
Heat up 1 cup of white vinegar, mix in about 1/4 cup of Dawn Premium. Not the dollar store kind, because it is too thin. When mixed, pour into a spray bottle and fill with water. Shake. Spray down the grout and let it sit overnight. In the morning rinse. If you have stubborn stains, spray again. Use this mixture a few times a week. It will keep your grout and tiles clean. Also works wonders in the toilet bowl to keep hard water stains at bay. Oh you only have to heat the vinegar one time when you add the Dawn.
My solution for the toilet bowl is vinegar. I let it soak while we are sleeping or away for the day. It is both a disinfectant and deodorizer. Then I use Simple Green spray to finish the outside and top. The vinegar also softens the mineral deposits that are rich in our local water and attach to the bowl. Hope this helps Judy.