Cleaning under toddler's nails

Pardon, I'm new at this. 2 year old, very active in dirt, gets it under
his nails. If I trim back all the way, I hit skin every now and then,
and I don't want to do this for obvious reasons. I've tried getting him
to claw soap (he likes doing this) and scrubbing it out (he hates doing
this). Not sure he'd hold still for an orange stick, but maybe with some
really special treat. This is a daily problem, usually fixed by an hour
at the Y's pool, but he doesn't go ever single day.
Help.
blacksalt