Adam Reach has called on the Owls to tighten up in defence in their quest to qualify for the Championship play-offs for the second year in a row.
Wednesday conceded a late equaliser from a set piece in their hard-fought draw at South Yorkshire rivals Barnsley last weekend.
Angus MacDonald’s header means the Owls have gone nine matches without recording a clean sheet.
“It was a good ball in and a good header but from our point of view it is sloppy,” conceded Reach.
“Barnsley were dangerous towards the end with the long throws and crosses into the box and we should have managed that better.
“We have to cut out the mistakes.
“If you don’t keep clean sheets, you usually won’t win games. There are seven games left now and hopefully we will keep seven clean sheets. In an ideal world, we will score three or four goals every game and then it doesn’t matter how many we concede but the Championship is not that simple and every team is dangerous.
“But if there is one thing we have shown in the past it is that we learn from our mistakes. I’m sure we will put it right on Tuesday.”
Despite seeing Wednesday drop out of the play-off positions for the first time since December, Reach is refusing to panic.
The former Middlesbrough winger said: “We have a lot of experience and promotions in our side. We have a lot of players who been there and done it. Hopefully that is enough and our team spirit and togetherness will get us over the line.”