Blenders are a good solution for everything from smoothies and juices to milkshakes to cold soups, and it’s always recommended washing to wash it right after use.
A quick way to clean your blender after use is to fill it up halfway with hot water, add drop of dishwashing liquid, and run the machine for about a 30 seconds. If your blender needs a more thorough cleaning, is looking a bit dull or it has stains resulted by hard water build-up, add a chopped lemon or a few drops of vinegar. Basically, with a little help the blender cleans itself.
Watch this video for a blender cleaning visual guide.