Here is a goal: How can I get my trash can clean outside?

Which way makes more sense to accomplish this goal?

Select from:
[-] Use the garden hose to spray down the inside of the can and put some soap in first if extra dirty.
[-] Use the garden hose to spray down the inside of the can and put some paint thinner in first if extra dirty.
Use the garden hose to spray down the inside of the can and put some soap in first if extra dirty.