How to expire an object?

Hi,

is there a way to expire an object before it is normally expired
by Squid?

I have an object that is cached as type "text/x-server-parsed-html" and
this is wrong because when I telnet to port 80 of the real server
I get content type "text/html". I don't know how the wrong information
got cached (it could be because I upgraded Apache yesterday and somebody
accessed this URL while the server wasn't properly configured) but
I need to get rid of this faulty cache entry.

Any ideas?

Thanks,

E.-

-- 
Eloy A. Paris
Information Technology Department
Rockwell Automation de Venezuela
Telephone: +58-2-9432311 Fax: +58-2-9430323