The EU's trade chief, Karel De Gucht, has warned that many Europeans think the TTIP "is an extraterrestrial."
Public support is crucial because the U.S. Congress and the European Parliament must ratify the pact. Germany has the largest contingent of lawmakers in the parliament.
Unlike some of their EU counterparts, Germans are aware of the negotiations. Barely a week goes by without the topic being raised on TV talk shows, in magazines, newspapers and on the radio. Unfortunately for proponents of a deal, much of the commentary is negative.
"It is easier to win an argument with fear than with facts," said a German businessman in the chemical industry. "Chlorine chicken ... genetically modified foods - these are out of the agreement, but it is hard to get the message across."
Read MoreU.S. says science should settle farm debates in trade deal with EU