For those who don’t often operate in these types of conditions, I’ll offer some humble advice. Contaminated runways (even wet) don’t leave the centreline and try to turn off until at taxi speed. It’s not a good feeling to start a turn and realize you don’t have the traction to finish it. Do all the slowing down in a straight line.
I’ve done this in ORD, LGA, BOS among other busy places right down to a crawl if the conditions are bad enough. Then I’ll poke along until the exit. I’ll worry about the guy behind me on a dry runway. Clear me to land on that crud, and I’ll take my time.
Note:
I am not sure if that is part of the circumstances here.