I have a property which has got mice in the loft this winter. I have check to see if there is any small opening or air ducts where they could get in but all looks good. Only one place that I can see is on my soffits they have the ventilation strip on.This is on the further point from the wall not the inner. Could they be getting in from here meaning they would have to run up wall and jump 8 inches across soffit ?