Cllr Killen received complaints from residents that the ditch had again become strewn with litter.
She immediately contacted the council and urged them to take immediate action.
The ditch was cleared by the community payback team.
Cllr Killen said: "As soon as I raised this issue with Sefton Council they immediately took action to clear the ditch of litter.
"I am now working with council officers to ensure the site is cleared regularly.
"Formby Labour Action Team has had reports in the past of rats in the area and we hope that getting Long Lane Ditch on a schedule for regular clearing will help ensure that we keep the rat population under control.
"But Sefton Council is facing even more government cuts which means it is very difficult to get any additional resources. However, we will continue to work with Sefton Council and local residents to tackle the problem."
Cllr Killen is calling on people not to carelessly throw away their litter in the streets.
Cllr Killen said: "Where there are litter bins, people need to use them. If there are no litter bins immediately available, then people just need to carry the rubbish until one is.
"People shouldn't be throwing their litter away.
"We all have a responsibility to keep our communities clean and if we don't there are very clear environmental repercussions just like we are seeing at Long Lane."