You have to store jow in a dark room, yet you also have to shake the bottle for a period of time. So when you shake the bottle, do you have to do it in a dark room? I suppose once the jow is properly aged, you can then use it in light? Also, sunlight is supposedly really bad for jow, yet some people use trees to condition their limbs and use wooden dummies outside, so I suppose once the jow is aged for the right amount of time it can be used in sunlight? Thanks in advance.