Cluster Flies!
Just came back from a lovely ride and back to my greenhouse of a gaff.
I can't open the bloody windows as because they're south west facing and get the sun all afternoon which means the window frames are packed with cluster flies, if I open them they all pour out and try to escape!
Anyone got rid of them before? Fumigation won't work because of where they are, do I just need like a surface insecticide and lash it all over the frame?
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