It's probably time to take a minute (or 10) to clean them properly and ... mix 2 teaspoons of bleach per gallon of warm water. Drop in the container to soak for 15 to 30 minutes, then scrub ...

Wash the container with cool soapy water to remove any residue. Rinse thoroughly. Prepare the Bleach Solution: Mix 1 tablespoon of bleach per 1 gallon of water in a large basin or sink.