Rubber can become sticky for any number of reasons. Shoes can leave tracks on a rubber floor mat, or food can be left behind on a rubber spatula. To get rid of the stuck-on residue, you must use something that dissolves the stickiness without harming the rubber. Harsh bleach and chemical-based cleaning products can eat away at the rubber and in some cases cause discoloration. Therefore, it is important to use mild cleaning products.
Fill the sink or a cleaning bucket with about 1 gallon of water and 1 tbsp. dish soap. Swish the water with your hands to thoroughly mix the soap.
Dip a cleaning rag or mop into the soapy water. Wring out the rag and wipe it over the sticky rubber. Wipe and rub vigorously until all of the sticky residue is gone.
Rinse the mop or cleaning rag with clean water. Wring out the rag and wipe it over the rubber again to remove leftover soapy residue.
Allow the rubber to air-dry.