DS aged 8 finally got his first verruca (I have been waiting for him to get one to do the duct tape method) unfortunately it coincided with him starting competitive swimming! He trains 4 times a week there is no way duct tape would withstand that! He can't stand me touching it even after it has been soaking for ages so filing down is not going well. I have resorted to clear nail varnish to cover it when he swims as waterproof plasters do not last against the amount of fins on/off in a session and he can't swim properly in a verruca sock! Help.