Save your spaghetti water and wash your greasy dishes with it. The flour in the water somehow causes oil and grease to get trapped, and you don't have to scrub as much.
This page contains the following solutions.
Corn Flour To Clean Greasy Pots. To clean greasy pots try throwing some corn flour, or any other flour and rub it. . .
Put a 1/4 cup of vinegar in your dishwater or a 1/2 cup of vinegar in your dishwasher when you have really greasy dishes. Vinegar cuts through the grease.
To clean out plastic dishes which contained oil or oily food: Take a newspaper half and tear it up into small pieces. Get some detergent and add the newspaper bits and the detergent to the plastic dish and add water.