- 18 c. assessment and action to improve conditions of detention 37. The CPT has already it made clear that police and border guard stations do not offer suitable accommodation and appropriate conditions for lengthy periods of detention.20 In the course of the 2011 visit, it became apparent that the situation had deteriorated further, with these facilities continuing to accommodate persons for weeks and even months in deplorable conditions. The assurances provided to the CPT by letter of 23 November 2009 and in the course of the January 2010 high-level talks, that administrative detention of irregular migrants in police and border guard stations would be ended, and that in the future administratively detained irregular migrants would only be accommodated in dedicated detention facilities, clearly remain unfulfilled. The current warehousing approach cannot be maintained. The Greek authorities must urgently address the structural deficiencies as regards the special holding facilities for irregular migrants. In order to create acceptable conditions for lengthy periods of detention, substantial investments will have to be made, not only as regards the accommodation, but also in respect of staffing, maintenance, medical care, regime and hygiene. 38. The CPT recommends that the Greek authorities ensure that irregular migrants are only detained in centres specifically designed to meet the requirements of this population, having due regard to the Committee’s criteria for places of detention for irregular migrants, as formulated in its 7th and 19th General Reports. Particular care should be taken to cater to the specific needs of minors and other vulnerable groups. In addition, with respect to the facilities visited in 2011, the CPT calls upon the Greek authorities to ensure that: - - 20 all detainees are offered a bed or plinth, bedding and mattress, all clean; all detainees have ready access to toilet facilities, including at night; all detained persons staying longer than 24 hours are provided, on a regular basis, with a basic sanitary kit (including adequate rations of soap, washing powder, toilet paper, shampoo, shaving utensils and toothpaste, and a toothbrush) free of charge; sufficient quantities of detergent and products for personal hygiene are made available at all times to detainees; all detained persons staying longer than 24 hours have access to a shower and to hot water; detainees are permitted to change their clothes; detention areas (including sanitary facilities) are maintained in an adequate state of repair and cleanliness; family units are kept together; female detainees are held in an area which is separated from that accommodating male detainees, and that their privacy is guaranteed; all detainees are offered at least one hour of outdoor exercise a day; the provision of food for detained persons is adequate and appropriate; call bells are installed in all detention areas where staff are not continuously present; occupancy rates are respected, and where necessary revised, so as to offer a minimum of 4m² of space per detainee in multi-occupancy accommodation. See for instance CPT/ Inf (2006) 41, paragraph 31; CPT/ Inf (2008) 3, paragraph 21; CPT/ Inf (2009) 20, paragraph 34.