OK, I looked up www.senate.gov for the contact info for one of the two Senators from Florida, Ben Nelson.
Basically, you need to fill out and fax or mail him the following form:
http://billnelson.senate.gov/supporting/services/Consent07.pdf
(The mailing address and the fax number are on the form).
You can do the same for the other U.S. Senator from Florida and for the member of the U.S. House of Representatives for your area - when you go to their website, look for the link to constituent services.
The other Florida senator, Marco Rubio, has just taken office and apparently has not yet set up a website. So you should stick with Nelson for now, and also whomever the member of the U.S. House of representative for your area currently is (here is a website that allows you to find out exactly who that is: https://writerep.house.gov/writerep/welcome.shtml )