I love my blender. It is my most-used small appliance. I worked at the smoothie bar in college, and my family even once owned a frozen yogurt and shake shop, meaning that for years I nearly always had a blender in at least one hand. I am a true believer, a worshiper at the altar of an ultra-smooth mix.

But this essential tool needs to be cared for in order for it to remain useful for years and keep your food safe. Here are some things you should definitely avoid putting in the blender—no matter how powerful your blades are.

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