What's with all the flipping cobwebs!

How is it that, in a few day’s time (and sometimes even overnight), my house can turn into the Haunted Mansion by virtue of all the blasted cobwebs that spring up all over? They’re everywhere, sans their 8-legged architects, and there is never anything caught in them. Cobwebs decorate my ceiling, the legs of my dining room chairs, the tubs and shower. They span my doorways – so that they stick to your face as you walk through. They rebuild as soon as I remove them. I can’t get rid of them! It’s a constant battle!

I don’t know why they’re here or what they could be eating, either. I don’t have ants. I don’t have gnats or flies – fruit or otherwise. So why am I plagued with all the cobwebs and their builders? And what can I do to get rid of them?