All my instruments receive regular cleaning and care, and valves receive a bit of oil before each use, I believe that’s why they have lasted so well, and the wearis almost negligible. Thorough clean monthly, and attention before each use. It works. After over 65 years of playing, I don’t have a teacher (though some may say I need one!)I’m glad that you like your Bach Strad 37 Trumpet. I suggest that you talk to your Teacher about valves and whether to lubricate or not. A bottle of valve oil costs little and lasts for years, it really would be a shame if your valves started to wear because you hadn’t lubricated them - valves and their casings are both difficult and expensive to replace, and alternative repair isn’t always possible or cheap.