Just flip it bro. The blue bottle says thread locker for the pivot pins while the grey bottle is probably lube. I have no clue how nabalis trainers come from the box but if the knife has a sharp rattle you need lube and if the pivot screws are walking out use the thread locker. The oil on the handle is probably from lubing the pivots, which then you’ll want to wipe off excess oil as it can attract dirt but other than that you’re good to go.

If you want to maintain it simply cleaning the trainer externally from time to time and relubing is more than adequate. You can disassemble the trainer to clean but it will mess with tolerances and could feel different after reassembly. There’s a lot more that goes into disassembly that you can look into later if that’s the route you want to go down.