We present a cooling method for a strongly interacting trapped quantum gas. By applying a magnetic-field modulation with frequencies close to the binding energy of a molecular bound state we selectively remove dimers with high kinetic energy from the sample. We demonstrate cooling of the sample over a wide range of interaction strengths and measure a high cooling efficiency of $\gamma =4$ that exceeds all previous cooling near Feshbach resonances.

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• Ultracold gases
• BCS-BEC crossover
• Cooling & trapping