There are a plethora of solutions on the market, but many of them are loaded with polluting chemicals. Plus, despite the inclusion of fragrances, the smell is often far too intrusive and downright unpleasant.

You probably don’t know this, but the best ally for keeping your bathroom clean is something you probably already own. White vinegar really is the best ally and has a plethora of uses.
Use vinegar to clean the toilet.