Been there, done that, let them dry out and tossed them in. They came out sparkly clean.
For some dumb reason I had opened a box of .22 ammo before taking it up to the barn. Muddy as heck out that day and and I slipped in the Missouri Grease that we call soil.
It cleaned up well and still shot. No problems with them. I did take my tumbler up to the garage and plugged it in there.
Inside Every Bright Idea Is The 50% Probability Of A Disaster Waiting To Happen.