The Lions were held to a goalless draw by the visitors as they extended their unbeaten league run to six games.
"The lads are really down in there so I've had to give them a kick up the back side," he told the club's official Twitter feed. "We threw everything at them. There were points in the game where we didn't manage ourselves quite right. At home it's not going for us.
"You don't know how crucial a point might be. We've got to go to Queens Park Rangers and get something, but why not?
"I feel a bit for the supporters because we are desperate to give them that home win. The fans were superb again."
Millwall are currently 20th in the Championship, just one point above the drop.