Blenders are among the easiest kitchen appliances to clean and among the most commonly left dirty, because the window in which cleaning is trivial is about five minutes wide. A smoothie rinsed out immediately takes thirty seconds. The same smoothie dried onto the blade housing takes a soak and a brush.
The self-clean method
Fill the jug about a third with warm water, add a single drop of dish soap, put the lid on, and run it on high for thirty seconds. The vortex scrubs the walls, the blades and the housing around them at the same time. Rinse and set it upside down to drain.
The deep clean, once a week
The self-clean cycle does not reach the one place that matters most: the groove where the gasket sits, under the blade assembly. That is where pulp collects, and it is why a blender that looks clean can smell sour.
- Unscrew the blade assembly from the base of the jug.
- Pop the rubber gasket out with a fingernail. Wash it and the groove beneath it.
- Brush the jug's screw threads with an old toothbrush.
- Take the lid apart, including the removable pouring cap.
- Dry every part fully before reassembling — trapped moisture is what makes smells return.
Portable blenders are different
In a portable blender the motor and battery sit in the base you are holding, sealed. That base must never be submerged or held under a tap, whatever the marketing says about being washable.
Run the self-clean cycle, rinse the jug, wipe the base with a damp cloth, and stand it upside down with the lid off so it dries completely. A portable blender put away damp with the lid on develops a smell within days.
Common problems
Two worth expanding. A cloudy jug is usually not dirt but etching from repeated dishwasher cycles — the detergent is abrasive enough to micro-scratch plastic and glass, and it cannot be reversed. Orange staining from turmeric or carrot is superficial: a baking soda paste left for ten minutes clears most of it, and an hour of direct sunlight clears the rest.
Getting rid of smells
A persistent smell is almost always the gasket. Remove it, scrub it with a baking soda paste, and leave it out to air overnight. If the smell survives that, the gasket has absorbed it and a replacement costs a couple of pounds.
For the jug itself, blending half a lemon with warm water works well and leaves it smelling of nothing in particular, which is the goal.
The short version
- A third warm water, one drop of soap, thirty seconds on high, rinse.
- Do it immediately — that is the whole trick.
- Strip the gasket weekly. It is where smells come from.
- Never submerge a portable blender's base.
- Warm water only; boiling water perishes gaskets and crazes plastic.
- Cloudy jug means dishwasher etching, and it is permanent.
The same logic — clean it before the residue oxidises — applies to coffee grinders, where the residue is oil rather than pulp.
