Once again, your mission is to avoid the oft-times high muggle population and retrieve, sign, and replace the nano. The difficult is due to the level of stealth required.
Take the chance to grab a snack, take a break, or just add to your cache #s. The signal may weaken as you get closer, but coordinates will get you within 15 feet. BYOP. (Note: overrover had this idea first, and with her permission we're just adding to the fun.)
The epidemic continues......................
PATIENCE AND STEALTH IS AN ABSOLUTE MUST