Hornet nest residue

I can typically knock down a nest but there is always that residue which seems painted onto the fascia boards they attach to.

Any tips on removing that black residue?

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Use hw and let it set for about 15 minutes go back and respray with hw again that area wait. Then rinse has normal.


I knock off what I can with the regular HW mix, then I take a pump up sprayer with around 50/50 in it and hit it with that. I allow that to dwell while I work on another side of the home - usually not an issue sine the nests are typically in shade.