Don't use bleach. Don't use bleach. Don't use bleach. Ok now that I have said that, use Dawn liquid dish detergent. Use slightly warm soapy water, do a few at a time, let them soak for 3-5 minutes, give them a gentle wipe in the soapy water, then dunk them back into the soapy water for about another minute, rinse with ater of a similar temperature.