You must clean your weapon after each use. After a while, this will not be a difficult task and with a good kit and accessories, it can be really fun. You should inspect each part and read the manual carefully. Watch videos on YouTube about cleaning the handguns. Many people, including a good friend of mine, use WD-40 as a first step in cleaning weapons. You can soak it for a few minutes and then use a wire brush to clean all the dirt. The other thing I recommend for every 9mm gun cleaning set is a good cleaning pad. This will make your workspace seem legitimate, and even if you can use an old carpet or a yoga mat, good carpet cleaning will ensure that your surfaces are better protected.