How can I safely and humanely get rid of a hamster that I no longer want to care for?

To safely and humanely get rid of a hamster you no longer want to care for, you can consider finding a new home for it by reaching out to local animal shelters, rescue organizations, or posting online ads. It is important to ensure that the new owner is capable of providing proper care for the hamster. Avoid releasing the hamster into the wild as it may not survive.