The Reds’ three-game unbeaten run in League Two came to an end on Saturday following a 1-0 loss to play-off contenders Gillingham at The Priestfield Stadium.
Despite getting into some good positions, Wrexham created few chances throughout the contest and Parkinson says his players need to be more clinical in the final third.
“It’s another game where we’ve had so much good possession in so many good areas and haven’t produced,” said Parkinson, whose side are now fourth in the table and four points behind leaders Mansfield Town.
“We have got to rediscover that killer instinct when we get in and around the box because we did a lot of very good things.
“When you have pressure like we did and a couple of breakaways in the first-half and other moments, its that ruthless edge and clinical nature of our game we have got to rediscover because you are not going to dominate a game for 90 minutes but when you have those periods, it is important to get a goal and recently we haven’t done that as well as we have done this season and in previous seasons.
“It is just making the right decisions and at the moment we are passing when we should shoot and shooting when we should pass.
“Maybe we are a little bit desperate for everyone to find those key moments but they will come back.
“We had enough quality out on the pitch to punish Gillingham more than we did.”
Wrexham played some good football in the first half but the Gills took the lead 10 minutes after the interval when the visitors failed to defend a set-piece.
The closest that the Reds came to equalising was when Elliot Lee’s shot was parried by goalkeeper Glenn Morris and Steven Fletcher’s acrobatic follow-up was going in but the Gills stopper made a superb save to prevent the ball from crossing the line.
“We know what Gillingham are all about; they are a set-play team and a massive per cent of their goals have come from set-plays, although it was never a free-kick for their set-play,” added Parkinson.
“The goal was disappointing from our point of view but our general play apart from that moment was good.
“It got a bit scrappy towards the end when they tried to kill the game off but we had enough situations to have gone and scored two or three goals.
“It was a great shot by Elliot and an overhead kick from Fletch. Little things like that aren’t going for us but we need to make our own luck.”
