Owls manager Dave Jones was disappointed by the errors made by his side that proved costly against Brighton at the Amex Stadium on Friday evening.
Wednesday were beaten 3-0 by the Seagulls, who went in at half time one goal to good courtesy of a deflected Wayne Bridge free kick, before Craig Mackail Smith and Will Buckley completed the scoring.
Jones said: “We are trying to do things and change things at the club but at the moment we are making too many mistakes and they are costing us.
“They are basic errors and players have got to dig in and do better than what they are at the moment.
“There’s not a great deal in it. It’s a fine line, but we are making wrong decisions in vital areas.
“We go through everything and talk about it in training but when it’s not done on the pitch it’s disappointing.
“We have to clear our lines when we have an opportunity to do so. For the last two goals tonight we were in a position to clear but we tried to play our way out instead of putting a foot through it and sending the ball into row Z.”
The Owls have little time to let the dust settle on the defeat at Brighton with a quickfire home clash against Huddersfield at Hillsborough on Wednesday.
And Jones has outlined the importance of getting back to basics after two successive defeats have followed what was a strong opening to the new campaign.
He added: “It’s just about finding that right balance and we’re getting it wrong at the moment.
“Brighton are a very strong side, we had as much of the ball as they did but we didn’t hurt them as much as they hurt us.
“They hurt us in certain areas but those are the things we will get better at. Don’t forget, we have brought in a lot of new players and we are trying to bed them in.
“We need to make sure we do the basics because we had such a good start but at this level, teams will punish your mistakes and that’s what we have seen against Brighton and Crystal Palace.”