There really isn't "static" IP's for home Internet users from their providers. They are all dynamic, however they usually have a semi-long 'lease' time with the DHCP server your ISP runs.
What has to happen is this, you have to "release" your IP address from your ISP for a long enough time someone else picks it up or it's sent back to the pool.
So, what you can try as your best bet is, before you go to bed unplug your router power.
In the morning plug it back in and you might have a new IP. They used to have shorter release times on cable modem but it seems they have it set very long now.