Both mine were a bit different but similar as well.
With dd I noticed that when I wiped it felt really really slick no matter how much I was wiping it wasnt getting better. So curious little me got the hand mirror down and had a look see

What I saw was a big bunch of mucus at my vaginal opening that was as white as snow. Of course I couldnt leave it there so I got the toilet paper and "really" went in there after it. When I did manage to get a good hold of it and pulled I could actually feel it tugging my cervix

: I got what I could and left the rest alone.
I kept going back to check every 30 min or so and it kept coming. I lost more of it over the next 3 days and finally went into labor. Since the plug remakes itself constantly you can loose bits of it for weeks.
With ds again the really slick feeling and but this time without the tuggy pully on the cervix

I lost it over 2 weeks time it was as white as snow to.
I never saw the plug with bloody show until I was well into labor with either.