We haven't done any spraying or pest control at our house, but if this trend continues we might need to make a call. My mom's exterminator also said that vacuuming baseboards to remove all web/food particles can help keep populations down. I have since gone on a spider crusade and vacuumed every square inch of the house, including under and behind furniture. Hopefully it helps some!
The spiders from that one bad morning. Four locations, and four different species:
Diaper Spider & Kitchen Spider
Bathroom Spider & Wall Spider