As an owner and almost daily user of the Vitamix 5200, I find that the simple dish soap with water tends to add build up or gunk to the inside of the container over the course of several washes. So, I've come up with a cleaning solution and it's all natural.
After blending, rinse the container in hot water. The way they suggest is to fill the container to the half way point with hot water and add 2 drops of dish soap. Turn it on variable low to 10 then kick it up to variable high and run it for 30 seconds. This way does work but an extra deep, natural cleaning step may be needed after awhile.
Or, you may skip the dish soap cleaning option. Always rinse your Vitamix out with hot water first. Then add the following to the rinsed container:
1. 1/3 cup of white distilled vinegar.
2. 3 tablespoons of hydrogen peroxide.
3. 1/4 cup of baking soda.
After bubbling slows, add hot water to the half way point. Turn it on variable low to 10 then kick it up to variable high and run it for 30 seconds. Empty and rinse one last time in hot water.
If you want to get a Vitamix, I recommend getting it from the manufacturer because it's backed by a 7 year warranty. Use this code to get free shipping ($25US/$35CN value): 06-008064.