Try applying the aloe vera get and then perhaps using a bandage to protect your chin. It sounds as if cleaning it is tearing off a scab. The scab forms to protect your skin, so only clean it very gently-- don't rub on the scab so hard that you rub it off. After cleaning, re-apply the aloe vera and use a bandage to cover the wound. Avoid touching it, other than gently cleaning and gently applying the aloe vera.