Five months after the police arrested a man for defecating on trains, authorities are facing another unpleasant problem: someone has been smearing poop inside compartments, enraging commuters and throwing Central Railway’s schedule into disarray.For the past three days, passengers on trains originating from Kasara and Titwala have been complaining about finding human faeces wiped on compartment walls, grab poles and even on seats.On Thursday morning, passengers created a ruckus at the station master’s office in Titwala, demanding that the coaches of a CST-bound train be cleaned immediately. The train, which was to start from Titwala at 7.55 am, was delayed by nearly 15 minutes as railway authorities tried to defuse the situation.An hour later, passengers on board another CST-bound local complained about the same problem. “There’s crap everywhere inside the compartment - it’s disgusting,” said a commuter.Rajesh Ghanghav, vice-president for a passengers’ association, Upnagriya Railway Pravasi Mahasangh, said that he had received similar complaints on Wednesday too.“When commuters boarded an 8.16 am local for CST at Kasara, they found poop smeared on seats in two first-class coaches, one of which was a ladies compartment,” he said. “A railway cleaner boarded the train at Atgaon, but it was not possible to simply wipe the crap off the seats.”The train left Atgaon after eight minutes and made another long halt at Titwala. Finally at Kalyan, cleaners used pressure pipes to clean the two compartments.In August last year, the Railway Protection Force (RPF) had to form a special squad to nab a man who had been defecating in ladies compartments of trains starting from Karjat.On Thursday, two services - 8.16 am Kasara-CST and 7.55 am Titwala-CST - were delayed because of the filthy, smelly compartments. Angry commuters stormed the station master’s office at Titwala, demanding an explanation.“They were so upset that we feared that they would assault the station master,” an official at the station said. “The problem came to light two to three days ago, but we don’t have machines and other equipment to clean the compartments. Normal cleaners refused to do the job.”The 7.55 am Titwala-CST finally left at 8.15 am.Vishwanath Dhatrak, general secretary of Karjat Kasara Passengers’ Association, said that the group had remonstrated with CR officials and demanded better patrolling of areas where trains are parked for the night.A senior Central Railway official said that the problem was affecting the suburban rail schedule. “There have been delays of 10 to 20 minutes as trains halt at three to four stations for cleaning. We have ordered better patrolling around sidings at Kasara, Titwala and a few other stations,” he said.