Methods, devices, and remediation compositions for themicrowave remediation of medical wastes are provided. The remediationcompositions include a microwave active fluid including a microwaveactive liquid, a microwave enhancer, and a viscosity modifying agent.Methods include immersing medical waste in the remediation composition andthen irradiating the medical waste and the remediation composition toremediate the medical waste. The devices include a container for the medicalwaste and the remediation composition, a microwave radiation source anda temperature monitoring device.