Have all sorts of spiders inputs (doors, window frames) fixed sprayed and since there are in our house in the countryside not only giant spider more in the house! I am very excited (previously every night, full of stress!). The critters who are exposed to them (in the basement overlaid wood ..., thence sies sometimes try or somewhere hidden in the basement), I find dead. Now spray the outside and window frames to prevent the cobwebs. Is also good, but holds seemingly outside not so long. Once spraying inside holds now easily 2 months. And the bottle is still long not empty. Can, however, nothing to report, as soon dies a spider spray directly on it I find Ghastly, and so far has anyway no longer purely married. Conclusion: great recommendation for defense !!!