I have a wasps nest in my loft. I cannot see or get to it because the space is a loft conversion with no loft cover. I know there is a nest because they crawl through the back of my down lighters mounted in the ceiling and get caught in between the glass defuser and cannot fly crawl back leaving my light fittings filled up with dead wasps. If I was to take the light fitting out of the ceiling to investigate I would only have a hole of around 75mm to see through. Has anybody got any ideas on how to exterminate them? Thanks