I am spider-phobic and really suffered in September last year, although once I got hold of some conkers I didn't have any more in the house.
However, conkers being late this year, I bought a spray called Midas X from Amazon which has been brilliant. Sprayed every corner I could possibly think of/reach, including corners of the built-in wardrobes. The spray stank of chemicals so I sprayed the livingroom and bedrooms in the morning so that they smelt ok by the time I used them in the evening.
I have not had a single spider (fingers x'd, touch wood, etc etc) although friends and neighbours have had some monsters!