You should probably do a complete disassembly and thorough cleaning after hunting poor conditions.
That includes the magazine tube, trigger group, bolt group, and the recoil assembly (from inside the stock).
Use a mositure displacing spray like WD-40 or carb and choke cleaner, blow dry with compressed air, lube liberally with CLP, and wipe down to a film.
On the recoil spring assembly, press the plunger in and flush the assembly with WD-40 or other cleaner. Then blow it out, lube it, and wipe dry.
Make sure that the bolt group is fully disassembled and that the internals of the assembly are cleaned and lubed properly.
Most is covered in my cleaning guide, but you'll have to go a bit further than what's covered in the guide, due to the exposure to moisture and dirt.