Last weekend, Manjunath, 33, a manual scavenger from Davanagere in central Karnataka, found himself among engineers and enthusiasts looking for solutions to the unhygienic conditions sanitary workers face. It was a hackathon at Bangalore’s Indian Institute of Science, where, based on the experiences Manjunath and his co-workers recounted, the ideas ranged from safety gear to sensors for toxic fumes. Manjunath cleans pit latrines and drains in his shorts and a loincloth. “We shouldn’t be doing this, but who will feed us then?” he asks. “We have been doing this all our lives.”