If you don't have/want to replace it, I remember I could "just" see it with the oil pan removed.
I was thinking about hooking several WD-40 type spray straws together and I think I could just reach one of the openings and give it a blast.
This was while I had the oil pan open on a new (to me) bike and I wanted to get a look at what type of scary crud might be there (Lucky me, it was very clean). I forgot to blast it (it was only slightly crudded up) and after several oil changes, it's cleaned up a bit.
TG