No, it is not safe to consume dishwashing soap, even if it is dried on dishes. Dishwashing soaps, including products like Dawn Powerwash Spray, are designed for cleaning dishes and other surfaces, not for consumption. They contain various chemicals that can be harmful if ingested in significant quantities over a long period of time.
While some residual soap on dishes is generally considered safe, it is still recommended to rinse dishes thoroughly after washing to remove any remaining soap residue. This is particularly important if you are using a concentrated product like Dawn Powerwash Spray, as the residue may be more concentrated and potentially more harmful if ingested.
If you have concerns about your dishwashing habits, it is advisable to ensure that you are rinsing dishes properly to remove any soap residue before using them. This will help minimize the risk of ingesting soap and potential adverse health effects.