I actually have the same problem, only not to the extreme shown in tjhouchin's pictures.
It occurs becouse of static electricty building up back there. The "hair" at least in my case only attaches as neato backs up to recharge. the blower is off when he's going back to base. Additionally, there is a small accumulation of hair around the base itself, which Neato by his nature can't reach to clean.
There are many times when My own Neato ( We call him "Diablo", short for Dust Bunny Diablo
) will not make a good connection after his third and last trip back from a mission. He will have completed the 3 outings, but at the last one he will have a small amout of hair at the base preventing him from recharging. When i notice his light is not charging I simply wipe the base contacts and his charging wires with two fingers. That is enough to allow him to make a good contact. Most of the time I notice it before he loses his charge completly and his clock goes dead.
I also of course clean him and his base area with a very small hand vac about once a month, or every 5 weeks if I get a little lazy. It is ironic, becouse the pet hair problem we have, is the biggest reason we baught him in the first place. And frankly he is very
effective at helping us manage it. If your going to have a dog or a cat, your going to have a hair problem to some degree!!
Thought for improvements would be a different kind of charging contact and/or perhaps a software change to make Neato turn his blower back on when he is an inch away or so from contacts ( call it,....fireing his retro rockets )
Yeah i know, just trying a little humor
Of course if
, I mean WHEN
Neato elvolves to include a self empying base/chargering unit, if it includes a small exterior vac similiar to either the Karcher or Samsung SR8980 units. That could be used to "blow clean" the charging contacts area as neato approaches just before he completes his dock.
Just my humble thoughts.