The 29 year old has not enjoyed a top-flight shutout since the opening day of the current campaign.
"You can see everybody's concentrating and focused on their jobs," Cech said.
"When you concede sometimes, you have to accept that the opponent had a very good chance to score.
"Against Blackpool last year, it was because, at 3-0, everybody just stopped doing what they should and that was why I got angry.
"But that was not the case this season."
He added: "It's always better when you finish off the games with a clean sheet.
"We had a little unfortunate run without having a clean sheet but we've played well, we keep winning three points, which is the main target.
"If you finish the game 0-0, you might be happy with a clean sheet but it's only one point.
"If you win 3-1, you've got three points and it's more important for the team.
"We are improving all the time and I think that we will get back to our track of getting clean sheets.