LONDON - Madonna is so worried about her obsessive fans that she reportedly orders sterile wipes of her dressing room after each show on her latest world tour. According to the Mirror, the pop queen has set up a “sterilisation team” to clean away any traces of DNA that she might have left behind from her hair, skin or saliva. And she is believed to have demanded that only herself and her entourage are allowed backstage and no one is allowed to even look at her dressing room once it has been made ready. “We have to take extreme care,” concert promoter Alvaro Ramos, who is looking after the Portuguese leg of the tour, said. “In the end it is all to protect her and make her comfortable. I do understand it but it is taken to extremeness,” Ramos added. The star also makes sure that her personal team build her changing room so there is no danger of anyone planting any hidden cameras. Madonna is currently on her MDNA world tour and has already played in Israel, Turkey, Italy and Spain and arrives in Portugal this Sunday.