Redid the kitchen about a year ago, before that taking the old kitchen apart found a slug nest behind kitchen cupboards. The worktop was cracked so water from the sink got under neath and gave them a moist enviroment. However after getting the new kitchen we've found a slug or two on the floor in the middle on the night, and looking between washing machine I can see slime trails under the worktop. Any ideas on how to stop them? Also where are they coming from, there is a vent but that's needed otherwise back of the cupboards won't get any ventilation.