Since they are created entirely out of porous plastic, storing or microwaving certain foods in your Rubbermaid containers can lead to stains. Oil-based stains and those caused by tomato-based foods tend to discolor containers the easiest and often prove the most difficult to remove. Stained containers can appear dirty, making many housekeepers fear they must throw out any discolored Rubbermaid items. By taking a few precautions and employing some cleaning techniques, you can prevent and eliminate stubborn Rubbermaid stains.
Soak the stained pieces in a solution consisting of 1 tbsp. of bleach per 1 cup of water. Leave the plastic in this solution for 30 minutes. Rinse thoroughly after using this cleaning method to ensure you remove all traces of bleach.
Create a paste out of baking soda and water and place it on your container. Allow it to dry. Wash the paste off and run it through the dishwasher. You might need to repeat this step several times for thorough stain elimination, but baking soda's gentle, effective cleaning power will help fade stains.
Place the stained product in the sun for a day to eliminate the stain and brighten the item. The sun can often thoroughly clean any stubborn stain remnants and make your product look virtually brand new.
Apply liquid Palmolive Automatic Dishwashing detergent directly to the stain and allow it to sit for 30 minutes. Wash the item ensuring you rub the solution in as you rinse it. According to the Rubbermaid website, this should help remove stubborn stains from your containers.
Drop a few effervescent denture tablets into a bowl of hot water and soak your Rubbermaid container in the mixture overnight. Run the item through a regular dishwashing cycle or hand wash it thoroughly.