Eight games without a win, Dundee United are told to find 'nasty' side
United have not won in eight matches ahead of their trip to Dingwall to face Ross County on Saturday.
Edwards was recalled in a new-look central defence and headed United a late lifeline in their 2-1 defeat, but the damage had been done by then with the home team taking a first-half lead following a corner.
United have now lost five goals from set-pieces during their barren run and Edwards shared his thoughts on how to stop the rot.
"Be nastier, just be nastier," Edwards said. "It's a great bunch, it's the best dressing room I have been in personality-wise. Everyone is a great lad.
"But when we go on the pitch I think we have to be nasty and do whatever you can to stop them scoring and do whatever you can to score."
The former Blackpool player added: "We speak about it every week, if you can't defend set-pieces coming in your box, whether it's individually or collectively or just someone taking control, then what chance have you got in any football match?
"How many games is that in a row now? It seems to be every game for a few weeks. Even if we haven't been conceding off them, we look like conceding off them.
"We tried something different on Wednesday night with me being a spare man to go and attack it. Obviously it's not come that far but if it comes down to individual battles, if you can't win it you have got to stop your man."
Wednesday's results give second-bottom Ross County the chance to cut the gap on United to two points, and manager Nicky Mellon has told his team they need to show more resilience.
"We have to now man up and understand that we have lost three games,” said Mellon. “We have to be tougher in those moments and see games along until we can find a way back into it to cause teams problems.”