I put the stopper in my sinks and add about a 1/4 cup of bleach and leave soak over night. It whittens, brightens and sanitizes
a capful in a spray bottle of water actually does a good job on the windows. Do not spray outside the actual glass to avoid spraying on curtains or walls.
I use a mixture of water and bleach in a spray bottle inside my shower and spray my white tile and grout with it after each use. It needs less scrubing.
I add 1/4 cup bleach to wash towels and sheets. This does not change the color, but brightens and maybe sanitizes the loads.