The web is easily destroyed by bad weather and by catching prey. After a day or two the adhesive droplets of glue also lose their adhesiveness. The old web is eaten and a new web is constructed again. The cutting and the digesting of the web are done by special digestive juices that contain enzymes rather than by any mechanical cutting. These juices are also used to connect the strands of silk together.
http://www.youtube.com/watch?feature=player_detailpage&v=UkWYhRD8BCM
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