Here is a goal: How to clean a blender.

Which way makes more sense to accomplish this goal?

Options are:
[+] Fill the blender with water. Add a couple drops of dish soap. Blend for a few hours, then rinse.;
[+] Fill the blender with water. Add a couple drops of dish soap. Blend for a few seconds, then rinse.;
Fill the blender with water. Add a couple drops of dish soap. Blend for a few seconds, then rinse.