This may be wired or 'noob' here but sh!t happened. I dropped my BP device a "GRANZIA" one from 130Cm or 4.3 feet. It had it's metal box on and cardboard box on too. I rashly opened it up. The tank was closed but there was few drops in the bottom of the tube and random dots of mercury besides it and at the bottom of the reservoir. I used the cuff and tilt the device to put the liquid back in but the small drops or dots remained. Now I don't no if that happened now or earlier as I didn't use it for a long time and I don't remember these drops. I even more worried if somehow I inhaled some of it although it was kinda' stuck but :/