Taking care of your instrument should be a top priority for every instrument. Not only will it keep your instrument in best working condition, thus lasting longer, but it will also ensure no "gross" things are going on! Below you will find a step by step guide to cleaning and maintaining each instrument. This will be passed out and kept in your binders as well. A few links are provided for your perusal as well:

NEMC Instrument Care

These next few links are how-to videos from Hornsmasher. He will walk you through assembly, disassembly, and daily maintenance...

Flute Assembly and Maintenance

Clarinet Assembly and Maintenance

Saxophone Assembly and Maintenance

Trumpet Assembly and Maintenance

Trombone Assembly and Maintenance

Euphonium/Tuba Assembly and Maintenance

Hornsmasher has also provided a few periodic (monthly) maintenance videos. Please never attempt any screw changes without the teacher present. Not every screw is supposed to be all the way in! If in doubt, do not attempt:

Flute Monthly Maintenance

Clarinet Monthly Maintenance

Woodwind Instrument Long Term Maintenance

Trumpet Monthly Maintenance

How to clean and lubricate a trombone slide!

How do you give your brass a bath? See the videos below for guidance. Never attempt this without watching the videos and knowing. All soaps must be rinsed thouroughly to ensure working order. Woodwinds should NEVER be bathed or placed in water (flute, clarinet, oboe, saxophones). 

Trumpet Bath Tutorial (this will work for Euphonium also)

Trombone Bath Tutorial