Without a league win at home since September, a clash with the struggling Shakers looked the ideal opportunity to end Preston's barren run.
However in a game devoid of quality neither side was able to create any real chances, and Westley admits his team will have to find a greater cutting edge.
He said: "We're in control of most of our matches, but we're just not showing the clinical side needed to win them.
"It's about finding the edge - if we'd scored early on you could have seen us run in two or three. The momentum was really with us. But in the end you have to credit the defence for keeping the clean sheet.
"The lads have got to be able to relish and enjoy that home environment. There's new lads learning to play the home environment - there are a lot of new players at the club this year and that learning process they are going through is something we've got to show patience towards.
"There are some good players there who do probably need that confidence.
"I thought we were dominant in the first half, we came out and took the game to us and created enough chances to win a couple of games, rather than just the one.
"The changes we made didn't affect the game in the way I hoped they would, they were poor changes and we lost our way when the changes were made."