Goal and options: How to wash your bike off after a muddy ride
output answer: Use a brush and a hose to rinse your bike off. Do not use high water pressure or direct water into any bearings or suspension seals.

Goal and options: What materials do you need to make flash cotton?
output answer: Sulfuric acid,Potassium nitrate, baking soda and cotton balls

Goal and options: To prevent water from growing bacteria, you can
output answer:
Use a small amount of vinegar or bleach