If you are already logged into Teeter.com, visit My Account > Account Details. There you will be able to change your password if you already know your current password.
If you have forgotten your password, you can visit this link and enter your email to receive a link to reset the password. If that email is registered with Teeter.com, you will receive an email within 10 minutes. Make sure to check your spam folder if you haven’t received the email.