Hi Michael,

Please add code below to application start event of your application:

    void PageCacheRefresher_CacheUpdated(PageCacheRefresher sender, Umbraco.Core.Cache.CacheRefresherEventArgs e)
    {
        var cacheEnumerator = HttpRuntime.Cache.GetEnumerator();
        while (cacheEnumerator.MoveNext())
        {
            HttpRuntime.Cache.Remove(cacheEnumerator.Key.ToString());
        }
    }

It removes in-memory cache. Do you use CachedPartials on your pages?

You can remove xml files also by code on page start.

Thanks,

Alex