Whoa.....There are brushes to do the job and commonly used. There is no time frame but remember all the nasty crap you're putting into the bore. You need these.........CLICK HERE

Remove the valves and slides.......Use a mild soap with lukewarm water and then a thorough rinsing...

For playing inspiration, go find "Kenton 76" and listen to the trumpet solo on "Send in the Clowns".........

Spaw