In particular, the exterior of a toilet.
My parents tell me to wipe the outside and surrounding floor of the toilet with a diaper several times (and then to wash the diaper with water in the sink several times). I'm really not sure if this is the most time-efficient way to clean the exterior of a toilet, and I'm not sure if it's the cleanest way to clean the exterior of a toilet either. Plus, the sink might get clogged with all the debris.
Something eco-friendly would be preferable if possible though.