White vinegar is a natural acidic that is handy for everything from cooking to cleaning and even deodorizing. Lay the greasy tools in a shallow pan and pour straight white vinegar over them. Make sure they are completely covered and return to them in about 24 hours. Rinse the tools off with hot water using a small brush to help remove any lingering, loosened grease. Set the tools onto paper towels to air dry.
Baking soda not only absorbs grease, but is a gentle abrasive and deodorizer. Cover the bottom of a shallow tray with baking soda and place the greasy tools into it. Cover the tools with baking soda and leave them for 24 to 48 hours. There will be a hardened layer of baking soda on the tools when you pull them out from the baking soda sticking to it. Wash them off with hot soapy water using a small brush to help eliminate residual baking soda and grease. Allow them to air dry.
One of the strongest acids from a food source, the juice from lemons will help you to cut through grease quickly and effectively. Place the tools into a cup and fill it with lemon juice. Leave the tools overnight and rinse them off in the morning. The lemon juice will eat through the grease leaving you with tools that look and smell clean. Rinse off the tools with hot water and allow them to air dry.
When looking for commercial products read the ingredients. Products such as Simple Green and soy based soaps are safe alternatives to removing tough greasy build up. Washing soda and borax are natural abrasives to help with stubborn residue and can be used in conjunction with other natural cleaners for additional scrubbing power.