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Tony Burman believes Dartford's team spirit is better now than at any point this season.
His players ended Good Friday in a muddy heap after scoring a 94th-minute winner against Hampton.
Five wins in their last six games have brought back the feelgood factor at the perfect time.
"We've got to work harder than our opponents," Burman said. "You've got to believe you're going to score and win the game.
"It's very important and right now the group are as close as they have ever been.
"The hunger, belief and desire is back. In the last three games, you can tell the players are starting to believe again.
"What happened on Friday was good for the morale and confidence.
"We're getting towards a much better place than when we played Poole."
Dartford are three points behind Havant with a game in hand after the leaders were held 0-0 at Whitehawk on Monday.
Burman's side, who host Weston on Saturday, were due to visit East Thurrock on Monday but the game was rained off.
"It makes you wonder what would have happened if we had played," said Burman.
"But we've got to concentrate on ourselves and the most important game is the next one.
"It's no good talking about catching Havant or winning the league - all our energy must go into Saturday.
"Weston beat us earlier in the season and they're a very good footballing side so it's not going to be easy.
"They've lost their last few games and they've got to start winning to have any hope of creeping into the play-offs.
"We'll have a game plan and we'll be doing our utmost to get three points."
Dartford visit Gloucester on Tuesday.