How do you update name servers quickly for domain names?

I just finished the process of transferring my site to a new host, but I have a problem, when ever you change name servers, it can take months for it to fully change. ISP%26#039;s keep a cache of the name servers and rarely update them. Does anyone know of a good way I can ping my ISP to tell them to update the DNS cache?|||Make sure the old ISP has expired your IP address from their DNS servers, then call your new ISP and have them set a lower TTL (time to live) setting on your DNS host records. Most ISP%26#039;s set their cache to expire within 24-48 hours so updates take place relatively fast. But you can sometimes request that time be lowered to 1-6 hours depending on how cooperative they are about it.|||http://www.wilderssecurity.com/archive/i鈥?/a>