To keep your showers generally clean and mold-free from week to week, use a daily shower cleaner. There are many brands available. You simply spray after each shower--no need to wipe or rinse.

If the fan is not very dirty wiping each blade on each side with a duster or dust cloth is probably all you need to do. If the blades have baked in dirt then use a sponge or a cloth wetted in soapy dish detergent to clean then, then dry with another cloth.

A good trick if there is a lot of built up dust is to put the fan blade inside a pillow case and then move the pillow case around (gently) to pick up the dust. (This idea is courtesy of http://www.today.com/series/how-often-should-you/how-clean-ceiling-fan-when-do-it-t113795 .)

Frances Gabe, the inventor and only-ever resident of the self-cleaning house died two days ago. How does a self-cleaning house work, you ask? Well, how do you think! Sprinklers in the ceiling dispense first soapy water then rinse water that flow down the walls and over the floors into drains in each room. Furnishings are made of a plastic that also gets cleaned in the process. Dishes and clothes are also cleaned automatically. The water flows through the drains out to the dog house where the dog gets washed in the process too! ​https://www.nytimes.com/2017/07/18/us/frances-gabe-dead-inventor-of-self-cleaning-house.html

This method relies on simple chemistry and used even simpler nontoxic products. ​http://www.today.com/style/homemade-jewelry-cleaner-clean-silver-jewelry-one-simple-trick-t103333