Why is the cocoon of silk moth is dipped in hot water?

The silk worm cacoon fibers are held in the wrapped condition by a natural glue. Under normal circumstances the moth will eat it's way out of the cacoon. This destroys the continuous nature of the fiber because he has chewed through it. The best silk comes from the long contiuous fiber. So before the moth can eat through the cacoon it is immersed in hot water. This disolves the glue and the harvester can pick up the loose end of the silk fiber and unwrap the moth.