i do live in wisconsin and have taken it out on my subdivision roads, so there is salt. (just riding it around waiting for snow to melt and trails to be ride-able) i have cleaned it, or at least i thought i did, well enough after each ride. just by hosing it down and drying with a rag.
but noticed today after putting on new pedals that my cassette looks like this.. very worried about it.
im still really new and maintaining my bike. what can i do to fix this?
forgot to add a picture