Hi CT, and welcome to the Thorn Cycling Forum!
I recently converted to clipless pedals on my Nomad, and noticed the Shimano product brochures for the pedals noted the pedal springs and catch-release mechanisms should be oiled periodically to maintain smooth operation. They didn't specify which oil to use, but I can see the benefit. Given the pedals' exposure to mud, dirt, and water as well as dust, I think a dry or semi-dry lube might be most appropriate.
When the time comes, I may try lubing mine with Purple Extreme chain oil, as it leaves little residue after the solvent carrier evaporates.
Best,
Dan.