yah you probably just got stuff wet down there, should go away when it all dries out, btw don't run ur engine if ur alternator is wet, u can cause it to short out. ur belts are probably wet, not a huge problem or concern, just watch out for ur electrical components when washing it down, or pull out ur battery and go to town with a hose, and wait until it dries then put it back in, ive done that quite a few times