How to view and clean OpenDNS DNS cache

OpenDNS is a major DNS service provider. Their ubiquitous DNS servers are used by corporations to individuals to speed up their DNS response time. The downside is that they maintain a huge DNS cache to speed up access time, which may cause delays in propagating any recent changes you have made to your DNS. There are two ways to address it:

1. The standard way is to reduce the cache refresh time on your DNS server as well as increment the serial no to indicate that a change has been made to your DNS records. Sounds complicated? Then read below for a simpler way to refresh the cache for OpenDNS hosted DNS servers
2. Go to https://www.opendns.com/support/cache/ and type in your hostname to see what IP address is cached in their different servers worldwide. If you see some servers still caching your old IP address then you can use the refresh button to refresh the DNS record for your IP address in their DNS servers

Note: We host our own DNS servers, but then that is definitely not the recipe for everyone to speed up their DNS.

Hat tip: Sajal