Why you should get tidy ups with extensions. When wearing hair extensions our hair still naturally sheds. The hair is trapped in the bond so therefore you must trim the shedder hair every 4-6 weeks to prevent the hair from dreading together. Maintenance with extensions requires keeping bond separate as well so your hair doesn’t become damaged while growing. Brushing the extensions with the recommended hair brush will help the shedded hairs face down to prevent them sticking up and out and dreading together.