My first valve of my trumpet will not go all the way down, I can't

Why Won't My Trumpet Play? Easy To Fix Problem on Older Yamaha Trumpets

Choosing Your First Trumpet

Freeing Stuck Valves — Robb Stewart Brass Instruments

Braces Killing Your Trumpet Playing?

How to Play the Trumpet:Techniques for playing the trumpet - Musical Instrument Guide - Yamaha Corporation

One of my trumpet valves gets stuck on its way up while I blow the horn. Is this a sign of dirt build up or damage to the valve casing? What can

Trumpet: First Notes

Trumpet Quickstart Guide

Facts about the Trumpet

How to Play the Trumpet (with Pictures) - wikiHow

Is it wrong to hold a trumpet like this? : r/trumpet

Stuck 2nd valve slide (been stuck since I got trumpet from cousin) can it be fixed at home? : r/marchingband