HOW to DETECT a 2-way Mirror....???

Not to scare you, but to make sure that you aware.Many of the hotels and textile showrooms cheat the customers this way & watch privately. HOW TO DETECT A 2-WAY MIRRORWhen we visit toilets, bathrooms, hotel rooms,changing rooms, etc., how manyof you know for sure that the seemingly ordinary mirror hanging on the wall is a real mirror, r actually a 2-way mirror, they can see you, but you can't see them). CONDUCT THIS SIMPLE TEST:Place the tip of your fingernail against the reflective surface and if there is a GAP between your fingernail and the image of the nail, then it is a GENUINE mirror. However, if your fingernail DIRECTLY TOUCHES the image of your nail, then BEWARE, IT IS A 2-WAY MIRROR!(there is someone seeing you from the other side). So remember, every time you see a mirror,do the "fingernail test." It doesn't cost you anything. It is simple to do. Keep it in mind! Make sure and check every time you enter in hotel rooms.