When elbow grease alone isn't cutting through baked-on food, sprinkling baking soda on top of dish detergent adds extra friction and scrubbing power.
Two Two-Ingredient Cleaners Already in the Pantry

The most effective cleaners are sometimes the simplest, and these two are made from just two ingredients each, both probably already in the pantry.
Dish Soap Plus Baking Soda
Dish Soap Plus Vinegar
A few drops of dish soap stirred into a bowl of vinegar makes an effective fruit fly trap: the soap cuts the surface tension so the flies sink and drown. Toss the bowl once the flies are gone.
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