I like testors Aztek nozzle because it does a great job on spray painting my plastic si-fi models. it gives me great results and easy to clean with the proper paint thinner. Ps: for good cleaning results clean immediately after use.
So unless you have an Aztek, it's pretty useless. I've used mine for 10 years or so, it carries a lifetime guarantee, so hopefully both it and I have more time together.