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I am sorry to learn of that, but I think that this product will help https://www.diatomaceousearth.com/diatomaceous-earth-bed-bugs/

That's if the school Authorities are ready to patronize the product. Don't you see how dirty the school hostel looks?

I would need to think about wanting to stay there, but I was trying to think about the people that were staying there and how bad it must be to be sharing sleeping quarters with blood sucking insects.