Search for Dark Matter with the PICO-60 Bubble Chamber

The PICO-60 bubble chamber contained 52 kg of superheated C₃F₈ and has set the world’s best limits on searches for spin-dependent (proton-coupling) dark matter. Final results from this detector will be shown, including new low-threshold data. Recent progress in measuring the nuclear recoil detection efficiency, understanding electron recoil bubble nucleation and new machine learning data analysis will be reported.