If you send it to them, it should come back like new.
I always remove the head and needle when I clean the Patriot. It's so easy to do and only takes a minute. The nozzle should just fall out. I don't trust merely flushing to do a good job.
Does the head unscrew easy after you break it free? Or, is it hard to turn the whole way? If it is, it may be cross threaded. Whatever, I'm sure Badger will fix it.
Don