What is the most logical next event?

How to clean and maintain a tuba
Read all warnings and prepare containers of water, etc.
Before starting.
Remove and disassemble all slides and valves, remembering how they go back together.

Pick from:
*Be careful cleaning surfaces such as the strainers, double-tong handles, etc. Pour water and get a cloth or a towel into water bucket of a sink to clean your instrument.;
*Take the body of the tuba and set it on top of a towel in a bath-tub full of warm, not hot, water and a little mild, non-abrasive soap. Rub gently with a washcloth to remove all yucky stuff.;
*Dip a digital tuner into one gallon (3.8 l) of water and access it to the pump valve. Loosen the discs at the bottom of the drum with a ratchet, then slide out the tuner valve, then remove all slides.;
*Re-slide any slides that are loose of the cover. Clean the fittings with water and antibacterial soap that has been provided.;
Take the body of the tuba and set it on top of a towel in a bath-tub full of warm, not hot, water and a little mild, non-abrasive soap. Rub gently with a washcloth to remove all yucky stuff.