Brett Deards says the Green Street store has been broken into every seven months on average for the past three years.

"They vary rarely get anything because the alarm goes off," he said. "But it just ruins your next couple of days chasing up repairs."

The most recent event occurred overnight on Saturday, June 29, when padlocks were cut on the front shutters, a window was smashed and a few boxes of lollies were stolen from a front display.

Police said it was the second break-in in two months and one of 13 break-ins since 2003.

Mr Deards said he had improved security after each time, and recently added CCTV cameras. He said in one case, the offender cut the power to the building, but luckily the alarm was on a battery.

"It's all just a deterrent," he said. "They find their way in then the alarm goes off and the police and us get called.

"It's a terrible feeling when you get a call in the middle of the night."

Mr Deards said because the incidents were mostly minor, they were more frustrating than they were expensive.

"If it's a $200 break-in, it's not worth claiming," he said.

Mr Deards said while the offenders were "just idiots", he wanted to send a stern warning to them.

"We've got cameras, sensors and security screens," he said. "If you do get in, the police are going to come."

Anyone who can assist police inquiries into the recent break-ins should contact Crime Stoppers on 1800 333 000.