- 27 Conditions of detention in police and border guard stations recommendations - the Greek authorities to:  take the necessary measures to reduce overcrowding in police and border guard stations, inter alia, by a better distribution of detained persons between establishments;  provide specific facilities for female detainees. Female detainees should never be accommodated in a cell together with male detainees with whom they have no family relationship;  clean, and where necessary refurbish, detention areas, in particular sanitary installations (showers and toilets). Preferably, access to sufficient natural light should be provided in all detention areas;  provide for effective ventilation of all detention areas;  provide access to outdoor exercise on a daily basis for all detained persons staying beyond 24 hours;  install call bells in all detention areas;  ensure that each detained person is provided with a clean mattress and a clean blanket;  systematically and regularly provide all detained persons staying for longer than 24 hours with a basic toilet kit, including adequate rations of soap, washing powder, toilet paper, shampoo, tooth paste, tooth brush and shaving utensils free of charge (paragraph 35);. - the Xanthi Police and Border Guard Station to be taken out of service until such time as the detention area is renovated (paragraph 35); - the Greek authorities to make a concerted effort to move away from the practice of detaining persons for prolonged periods in police and border guard stations (paragraph 36). Conditions of detention in special facilities for irregular migrants and police holding facilities recommendations - the Greek authorities to put in place a contingency plan to cope with any massive influx of irregular migrants (paragraph 38); - the following improvements to be made in the Petrou Ralli and Aspropyrgus Police Holding Facilities:    access to toilets to be guaranteed, including at night; call bells to be installed in all cells; arrangements to be put in place to provide every newly-arrived detainee with a clean blanket and clean mattress (paragraph 39);.