AK missed flop

[nicky g]

2-4 in the Borgata/ I have a maniac two to my right. I am on the button with AKo. A few limpers and the maniac raises. A decent player cold calls, I reraise, two callers in between,a dn maniac and decent player call. Flop is 622. Checked to maniac who bets, decent player calls, I raise and manage to get the others out. Maniac calls. He may well have something here; he is maniacal preflop but not particularly on the flop. On the other hand I've seen him bluff at least once. I imagine he has something that includes a six. Turn is a ten. Maniac bets, decent player folds.

How's my line so far? What do I do?

I almost never play limit so apologies if this is dumb.