No, it is not safe to consume dishwashing soap, including Dawn Powerwash Spray, even in small amounts over a long period of time. Dishwashing soaps and detergents are specifically formulated for cleaning dishes and kitchenware, not for consumption.
While most dishwashing soaps are designed to be rinsed off thoroughly, leaving soap residue on dishes and consuming it can have adverse effects on your health. The ingredients in dishwashing soap, such as surfactants, fragrances, and other additives, are not intended for ingestion and may cause digestive discomfort, irritation, or other health issues if consumed regularly.
It is important to rinse dishes thoroughly with clean water after washing them with dish soap to remove any residue. Dish soap residue left on dishes can affect the taste and may cause digestive discomfort if ingested.
To ensure your safety and the safety of others, it's advisable to properly rinse dishes and kitchenware with clean water to remove any soap residue before using them for food or beverages.