It is easy to find the contact information for your state's senators. The phone number, mailing address, and email address for all 100 United States senators is public information.
To find the contact information for your senators, go to the contact senators page and find the state you live in. Each state has two senators at any given time. As you can imagine, senators get a lot of communication from the public, and they have assistants to filter and sort most of it. In order to get a favorible response, try to make your message well-written, succinct, and polite.