Mac is right- In Hawai'i, steel is considered biodegradable!
Real key is gong to be did your cleaning solvent (be it Hoppes #9 or ElectroSol with Lemon!) dissolve whatever you meant it to dissolve? Carbon from powder residue is one thing, salts from corrosive primers another, lead/copper fouling another, and taco sauce another (I TOLD you quit keeping your lunch in my range box!)
The kettle full of hot water and M1 Garands was for a reason- much Garand ammo WAS corrosive primed. It WILL take care of the chlorate salts, and with some soap, powder residue- but not metal fouling. Ultrasonics clean everything. My .50 Hawken HAS no copper fouling- only dead soft lead bullets and REAL black powder- Dawn and hot water the way to go.
Whatever you use, dry it well and lube it after. Buy your OWN blow dryer for the shop instead of swiping Mom's- you'll thank me for that later!