The composition of several exoplanet atmospheres has been largely debated with contrasting results in the literature. Low- and high-resolution spectroscopy offer complementary views, although sometimes appear to be in sparkling contrast. We present a new approach to simultaneously model low- and high-resolution observation and apply this method to resolve known controversies in the literature. We show that the synergy between different techniques of observations is significantly more informative than the separate analyses. We recommend the joint analysis of low- and high-resolution exoplanet spectra to fully exploit the potential of upcoming space missions, such as JWST, Twinkle and Ariel.