It's passed it's closest point to the sun September 19th. That's why it has that 18 million mile long tail.

It was visible to the southern hemisphere before dawn until about the 8th of this month. 

Best viewing in the northern hemisphere was supposed to around it's nearest point to earth in the 12th. 

May be able to see it a couple more days, but i also live in an extremely light polluted area that has had strong desert breezes that have kicked up a ton of dust.