I am trying to access data from a website that has many different
stores. A seperate page is used to input the zipcode of the store.
Everytime this page is accessed and a new zipcode is entered, the store
is set as the default and the info is saved in a cookie.

I can automate chaging the store, and the webquery works fine. The
problem is that the webquery, after being run once, doesn't acknowledge
the change in the cookie, i.e. if I set a particular store, download
the data, then change the store and try to download the new stores
data, i end up with the old stores data. its as if the webquery has a
cache or something... is there a way to refresh or clear the cache, or
is there another mechanism to make the webquery check the cookie each
time?