When I clean the tub I sprinkle BS all over it, spray it with straight vinegar, let it sit for a while then go back and scrub it a bit. I'll do this same thing to clean the oven, it's a little work but it gets the job done. For the toilet I like to use straight hydrogen peroxide.
I'll second vinegar for mildew/mold. After a shower I'll spray it down to prevent mold and I spray my dish rack and cutting board with it too.
Vinegar is acidic- acetic acid- and kills bacteria, mold, germs, deoderizer, cuts grease and soap scum, and dissolves mineral buildup


: I'm not a Bronner's convert, yet.